Accountant of Tang Dynasty, starting to liquidate the family property.

Qin Song wrote the words"Military Academy" on the blackboard, turned around and said:"The establishment of the Military Academy started when I entered Zuowuwei. With the grace of the Holy One, I was appointed as the Deputy Supervisor of the Lower Mu.

This position In fact, it is to manage the calculation of grain, food, military pay and other matters in the army, including the grass eaten by the war horses. At that time, I saw that everyone's calculation methods were a bit backward, so I wanted to pass on the methods I had mastered to everyone, but I didn't Thinking of this small move, I actually asked General Niu Jinda to report it to the general, and then reported it to His Majesty.

He refused to give up, and he appointed me as a knight commander and a professor in the Imperial Academy. What I am grateful for is that my mother was also appointed by His Majesty. I was canonized as the fifth-grade Imperial Lady. The military arithmetic school was also given the name Military Academy.

Thunder, rain, and dew are all your kindness. In order to repay Your Majesty's kindness in knowing and meeting, I plan to teach all the students of the Military Academy what I have learned in my life. With my weakest strength, , to serve the Tang Dynasty.

The difference between the Military Academy and the Arithmetic Academy lies in the categories learned. First of all, what the Military Academy learns is a brand-new calculation method.

This calculation method is faster and can be used in the combination of various formulas. It’s simpler. And the first lesson in the military academy is to teach a brand new number model."

Then, Qin Song wrote a line of numbers on the blackboard

"Please see, this is twelve thousand six hundred and twelve, but as long as we add a horizontal line above one, the value will become more than twenty thousand...

In order to avoid this kind of false accounting situation , we created uppercase text, such as, one, two, three.

When calculating, we use 1, 2, 3 instead……"

Qin Song wrote all three characters on the blackboard and asked with a smile:"Everyone has already figured out 28, so how do you write thirty-two thousand seven hundred and seventy-seven? Which classmate can come up and write it. Like me In this way, raise your hands and wait for the call to be called."

This method is still very rare in Datang. It is indeed a bit exciting for students to come to the blackboard to answer questions. Many people dare not raise their hands, but there are also bold people who want to experiment.

"This classmate, come and try it"

"Yes, sir!"

I saw him come up and take a few steps, first salute to the people below, and then pick up the chalk. His hands began to tremble. He could obviously write according to the characters on the blackboard, but he was trembling and there was a layer of cold sweat on his forehead.

Qin Song smiled. :"Don't be nervous, look, just copy these numbers."

After finishing writing, Qin Song nodded:"It's very good. I'll write another one. Who will try it? I called a male classmate just now, and this time I called a female classmate to come up and answer the questions."

I heard that when female classmates were called, many girls were too scared to raise their hands. Even Qin Song didn't dare to look at her. Li Yaner and Fang Yizhu were the only two people in the room... At this moment, Qin Song suddenly remembered Grandson Fei'er, if she were here, she would probably raise her hand. She's so damn good, why did I think of her?

Qin Song wrote another string of numbers, turned around and said with a smile:"Li Yan'er and my room sister are invited, everyone." encourage!"

There was a burst of laughter in the audience, and thunderous applause broke out in the Chinese Academy of Sciences...

Two numbers, one for each person, were waiting for Qin Song after they were written. Qin Song looked at it carefully and nodded:"Very good, both of you. The female classmates all answered correctly.

Then, he took out two zodiac pendants from the side of the podium and handed them over:"In recognition of your bravery, this is your reward." There are no male classmates."

The two girls took the small pendant and were very happy. They bowed to Qin Song and walked slowly away.

Li Shimin laughed:"This kid has some skills. This kind of class is really unique."

Li Jing nodded:"Yes, it's a great way to go on stage and answer questions. Fang

Xuanling said:"I feel that these two characters invented by Qin Song are very good. Using those capital characters can completely avoid problems in the account books."

Li Shimin nodded:"Yes, not bad." These few words of this son solve a big problem."

Li Jingyan said:"Your Majesty, when Qin Song was in the army, he also made horseshoes and stirrups. I ordered people to test them. When the stirrups were installed on the war horse, the disability was reduced by eight levels.

About 170,000 Tang Dynasty war horses are injured every year. With these horseshoes, we have saved more than 130,000~"

After hearing this, Li Shimin, whose beard was still hanging, asked in surprise:"Is there anything else? Why didn't anyone report it?"

"Now the Zuowuwei and the Shenwei Army are rushing to implement it, and they are about to report to Your Majesty to promote it to the Sixteenth Guards of the Tang Dynasty and the Tenth Army of Beiya.

Moreover, the stirrup is a double-sided stirrup. If you stand on it to cut branches, you can shoot farther. Many generals said that if you step on it with both feet to fight, it will be more powerful. Li

Shimin nodded:"Yes, this power comes from the soles of the feet, why didn't we think of it.""

Looking at Qin Song talking eloquently on the stage, Li Shimin looked at Qin Song for the first time. This guy seemed to be really extraordinary.

At this time, Qin Song wrote a lot of numbers in one breath, and many students came up to answer the questions enthusiastically. The classroom effect very good

"Today we just briefly introduce the numbers of the Military Academy. Next, I will introduce to you the second learning content of the Military Academy, surveying and mapping!"

Qin Song put down the chalk and said:"When I was in Zuowuwei, I looked at the map of our Tang Dynasty. I found that although the directions were correct, there were no distance marks.

I have asked many soldiers this question, and they all shook their heads. Therefore, I hope to draw the most precise map of the Tang Dynasty in my lifetime. Based on this idea. Cartography emerged spontaneously."

After Qin Song finished speaking, he looked out the window:"Everyone, please look at how far it is from the entrance of our Wensheng Church to the pavilion in the distance? Who can tell"

"Sir, it should be five hundred steps……"

"At least four hundred steps~"

"No, four hundred and fifty steps at most……"

At this time, the court ministers also looked outside. Li Shimin glanced at it:"Five hundred and fifty steps!" Qin

Song smiled and said:"Okay, everyone has many answers, let me measure it!"

Qin Song saw He walked to the window, stretched out his thumb, and after measuring, he said with a smile:"Five hundred and fifty steps! Which student wants to try? Remember, start measuring from me!"

Qin took the lead bravely:"I'll go!"

"I am coming too!

Qin Song turned around and said with a smile:"Dahu, you go too!""

The three people started testing from the window in front of Qin Song, attracting everyone's attention.

"One hundred steps turns out to be so short……"

"That big tiger moves very accurately.……"

"Du He walked very fast. Li

Shimin looked back at Li Jing and asked,"How can this kid know it by just measuring it with his finger?"

Li Jing smiled bitterly:"If you ask me, I don't know." Master Kong, Master Fang?"

All the ministers around shook their heads. No one had ever seen this kind of measuring method using fingers.

"Look, five hundred steps is really not enough."

"five hundred and seven……"

"Five hundred and twenty-three……"

"five hundred and forty seven……"(To read exciting novels, go to Feilu Novel Network!)

"Five hundred and fifty-one……"

Qin ran back and said with a smile:"Mr. Hui, the student measured five hundred and fifty-three steps."

Du He:"Mr. Hui, the student measured five hundred and sixty steps."

Qin Hu ran back and saluted and stood at attention:"Report to the instructor, measure Five hundred and forty-seven steps!"

After hearing the values ​​​​of the three people, everyone looked at Qin Song, this is too weird, just raise your finger?

Even the ministers who were listening to the lecture were confused, could their fingers have such a magical function? Even Li Shimin was waiting for Qin Song's answer.

Li Yaner asked:"Sir, why is this? Why can you measure it by stretching out your finger?"

"Yes, what a wonderful method this is? Please teach me, sir."

Qin Song said with a smile:"This is a visual inspection method with fingers. Extend the thumb of your right hand, close your left eye first, then remember this point, then close your right eye and remember this point. Just expand the distance between two points ten times."

Many students looked at Qin Song in surprise:"Is it that simple?"

"Yes, it’s that simple! If students still don’t believe it, you can test the distance from your place to the door and you should be able to get the result."

Sure enough, after Qin Song finished speaking, many students started to raise their thumbs to measure, and the ministers on the side also started to raise their fingers to learn surveying and mapping. The results obtained were similar. You know, in this era, there are no very accurate units. , being able to measure it to this extent with your fingers is already considered a monster.

"Sir, you are amazing, right?"

"Yes, why do you know the distance just by measuring it? Please give me an explanation."[]

Li Yan'er also asked:"Sir, why?"

Seeing Li Yan'er's eyes shining with desire, Qin Song smiled and said:"This depends on our eyes and fingers."……"

As Qin Song spoke, he drew pictures of eyes, fingers and distant objects on the blackboard in a cartoon style, connecting them with dotted lines.……

"This method can not only test the distance, but also the height. If you learn it well, farmers can measure their own land, and military strategists can even test the height of Mount Tai...

And with distance data, we can know, if When we send out troops, we know how long it will take, how much food and grass will be consumed, and at the same time, we also know how long it will take to encounter the enemy. In short, this is a subject worth learning.

"Wow~"

There were exclamations, and everyone was shocked by this surveying and mapping science. They didn't expect that a small finger could be of such great use.

Li Shimin twirled his beard and nodded:"I'm afraid this kid is a monster. Not only He is the arithmetic Qilinzi of the Imperial Academy, and perhaps also the Qilin in the army.……"

Kong Yingda hurriedly said:"Your Majesty, we have agreed that this Qin Song is from the Imperial Academy of our country."

"I know, I know~ Hehe~ I know."

Seeing Li Er's malicious smile, Kong Yingda was a little unsure at this moment.

【Thanks to Bandit B for his monthly ticket and reward~】