"Every three into one, every six into two, every nine into three, three one and three more than one......" Wu Yanzhi said.

His first number to divide was "3", which is the division formula for abacus.

In an instant, a four-digit division divided by two digits was unraveled by him.

The fingering of that flying was many times faster than the most superb luthier they had ever seen!

"It's amazing!"

"I don't know how King Donglai invented it, this is amazing!"

"I have been teaching in Chengjun for 20 years, and I have never seen anyone with such a fast calculation speed, this thing is worth ten people!" The teaching assistant was amazed.

"I didn't expect the prince to have such a magical skill! This is great, if this abacus is popularized, I am afraid that the efficiency of my Great Zhou Xu will be increased tenfold. Why didn't you see King Donglai talk about it before? Tomorrow morning, I have to propose it to the Holy God and promote this abacus throughout the country. "The king of the inner history and the good praised.

"It's just a small thing, and the prince has a good reputation. The contemptible people are busy with copper and iron affairs, and the abacus invented a few years ago has not been used. He smiled faintly.

Those doctors, teaching assistants, prime ministers, and squires all thought this calculation was very strange and wanted to see what it was.

Wu Yanzhi simply demonstrated the method of addition, subtraction, multiplication and division to them. To the amazement of these people. Even the invincible Zong Chuke couldn't help but nod his head again and again.

"Ladies and gentlemen, the time is almost up! Let's invite the prince to come to the classroom to teach us! The high sacrificial wine said.

As soon as they heard that it was time for class, everyone dispersed to make way for Wu Yanzhi and Gao Saijiu.

"Lord Wang, please first." The high sacrificial wine was even more polite to Wu Yanzhi.

A group of dozens of people came to the classroom.

This classroom is specially designed and is not considered a classroom for students. This classroom can accommodate more than 200 people and is a special classroom for Guozi students.

Inside the classroom, 30 students were already waiting inside. Seeing a number of officials and teachers coming in, they quickly got up to greet them.

The rules of the classroom are naturally the rules of the classroom, and those prime ministers are still sitting in the vacant seats vacated in the front row.

"A big gift to the teacher!" There was a Cheng from Sungkyun who was on the side to guide him.

These officials, when they were young, all worshipped their teachers, up to the etiquette of saluting their teachers.

So everyone, including several prime ministers, gave Wu Yan's trip a big gift.

Wu Yanzhi is the emperor's envoy, and this is also the emperor's order for them to come to the class, and it is not ashamed to salute the teacher.

"Teachers, ministers, colleagues! Today, the contemptible people were ordered by the Holy God to explain the use of the number of the Great Zhou Kaiyuan.

Don't look at this symbol as simple, if you really want to use it, if you really want to learn it, it can't be done in a day or two. Let me start with these numbers......"

Fortunately, ancient China invented the decimal algorithm. Otherwise, it would be very troublesome to teach the Arabic numerals.

Of course, counting with Arabic numerals is much more convenient than counting with ancient Chinese characters.

There is nothing to talk about using Arabic numerals instead of Chinese characters. The content to be talked about is not only simple substitution, but also the use of numbers to add, subtract, multiply, and divide decimal places.

These arithmetic students will naturally learn it as soon as possible, but they have learned all the arithmetic classics before the Tang Dynasty in China, such as "Zhou Ji Sutra", "Nine Chapters of Arithmetic", "Island Sutra of Arithmetic" and so on. This is just replaced by the symbol of Arabic numerals.

However, except for the rest of the officials who are arithmetic students, this multiplication and division is like listening to heaven!

……

This teacher is not good.

In the morning, he gave a lecture, which made Wu Yanzhi's mouth dry and his false fire rose.

This is his first time as a teacher, and it is a teacher for Datang.

"That's all for this morning, and I'll talk about abacus in the afternoon. If you have any questions, come down and talk to ......," Wu Yanzhi said.

……

"Oops! Unexpectedly, King Donglai was not only a natural general, but also so proficient in arithmetic! ”

"How did King Donglai come up with this Kaiyuan number? How can we not come up with such a simple thing? ”

"That's it, this is much more convenient than using words, and I will save a lot of trouble when I become an official in the future."

“……”

Some of the students talked about it and praised it.

Those prime ministers, Shangshu, squires, and officials and teachers of all sizes in Chengjunjian were all amazed by the Kaiyuan number explained by Wu Yanzhi, and they were amazed by the book of heaven.

After the class salute, Wu Yan took the lead out of the classroom.

Between classes, he felt very comfortable with the expressions of the incomparably amazed expressions of these prime ministers, scholars, and squires.

Unexpectedly, he traveled to this Da Zhou and became a teacher, and these important figures in Da Zhou International admired him so much.

His mood swelled a little.

……

Naturally, noon is a hearty lunch, and since there are still lectures in the afternoon, do you have any alcohol?

Still, when it comes to the magic of the numbers, these people are still pleasantly surprised.

This is the Na Yan Yao Xuan said: "Gao Gong, according to the contemptible people, the abacus of King Donglai is a very convenient tool.

After today, you will produce more according to this thing. Take advantage of the opportunity of the prince in Luoyang to teach these students. ”

"Yes! The next thing to do is to do it. ”

In the afternoon, Wu Yanzhi explained the study of abacus to everyone.

"Lord Wang, this abacus is really magical, I'll wait for the students to send one by one!"

"Lord Wang, there are too many formulas, can you send a formula?"

"Lord Wang, can you say this division mantra again?"

“……”

Wu Yan gave them an answer one by one. This abacus is not a day's work, and it cannot be obtained without long-term exercise. So he said: "Everyone, I have given this mantra to Liu Siye, and he will send it to you."

We still lack a few direct officials who know how to arithmetic, so you must study this method of arithmetic. Today, I will ask Gao Saijiu to select two outstanding students who have passed the examination from among you people, and follow me to Hebei to handle railway affairs, and fake the patrol officer.

When I return to the capital this winter or next spring, I will send someone to evaluate and select a few more. If you are interested in entering, you can give it a try. ”

When everyone heard this, they were naturally overjoyed. Especially today, there are two people who can be inspectors, and this is not an easy opportunity to get.

It was not easy to get into these two departments. Much better than entering the house that will be supervised.

Wu Yanzhi will have to do projects in the future, build roads and railways, and he will need a lot of manpower. In particular, there is a need for these talents who know how to do arithmetic.

As for the formula, there were no photocopiers in the past, and it was not possible to re-engrave and print them, or ask someone to copy them.

"Wang Xianggong, Yao Xianggong and all ministers, colleagues, teachers, students, contemptible people are here today! Ladies and gentlemen, I would like to invite Wang Xianggong and Yao Xianggong to give you a lecture! "Wu Yanzhi finished the class, and he had to give the two prime ministers who had never been here a chance to give the students a chance to speak. Please Baidu "Throw Book Network" Thank you for your support!