When he came to Jiating again, Liu Jin was very surprised.

Because he found that this place had changed drastically from the last time he came.

Originally, the endless sound of reading aloud in every household has disappeared.

All I could hear was a strange crackling sound.

Countless scholars dressed in Confucian costumes exchanged heads in the shade of trees, in courtyards, and even beside the road.

What they discussed was not "poems" or "books".

It's something inexplicable.

What three down five go to two, four go six into one.

Liu Jin was confused.

What is even more exaggerated is that a large number of scholars gathered at the door of several peasant households in the pavilion.

The men gathered together, looking excited and nervous.

And in the courtyard, several civilians dressed as farmers, armed with saws, files, and wood, seemed to be fiddling with something.

In a moment, someone made an object, and a scholar took it and immediately carried it home happily, and at the same time dropped a large handful of five baht coins.

"Does Zhang Zizhong have any innovations?" Liu Jin was puzzled in his heart, so he asked the coachman to drive forward, stopped the gentleman, and asked, "What is your Excellency holding in your hand?" ”

"Abacus!" The other party was obviously extremely happy and replied casually.

Liu Jin also saw the thing he was holding in his hand.

It is square, with wooden beams and wooden plants, and it looks unremarkable.

But the other party obviously didn't want to answer more, and hugged the thing, as if holding a beloved girl, and happily walked somewhere.

As he walked, he recited some strange words in his mouth: "One up, one up, five to four, one to nine, one to one......"

This made Liu Jin extremely curious, and his heart was like a cat's claw, so he got out of the car and went to the gate of one of the farmer's courtyards where the scholars gathered.

Several attendants who followed the carriage on horseback immediately followed.

Don't look at these people, they are all in Tsing Yi civilian clothes, and they only have a sword tied around their waists.

In fact, their clothes were covered with armor.

He also carried a ringing arrow in his belt.

As soon as something happens, you can draw your arrows and gather the guards outside the pavilion to pretend to be doing routine marching and training.

If necessary, you can even directly summon the Changshui cavalry stationed in Changshui Township to help.

This is all the security experience that the Liu family has accumulated over the decades - no way, the royals of the Liu family have always loved to travel.

Since Emperor Gao, the Son of Heaven has been in white clothes and playing folk games.

This security work naturally has to be cautious.

Liu Jin didn't know these things at all, and he squeezed into the crowd excitedly.

But in the courtyard, a young farmer in his twenties, barearmed, holding a saw, sawed pieces of wood into pieces of wood of different lengths.

There were also two young men, holding a file, and pounding the small logs little by little, until they were rolled into a bead about the size of a date, and then they wiped a handful of sweat and continued to make the next one.

"Brother, what are you doing?" Liu Jin arched his hand to a scholar beside him and asked softly.

"I'm doing an abacus!" The man replied, and then, looking at Liu Jin, asked with a suspicious expression: "Don't you know that Brother Xian, what happened to this Jia Pavilion?" ”

In the past two days, the matter of Jiating has spread throughout Nanling County, and has begun to spread to the surrounding Baling, Lantian, Feng County, and Hu County.

Perhaps, even Chang'an City may have heard the wind.

As a result, the Pavilion is like a magnet, constantly attracting scholars from all directions.

Yesterday, there were more than 300 scholars in Jiating.

So much so that the houses in Kotei are a little crowded.

"Dare to love my brother, what is this abacus? What can it do? Liu Jin hurriedly asked.

"This abacus is made by Zhang Jun of this Jiating...... this man said proudly: "This thing is miraculous, and it can be counted as the world's most numerous!" Zhang Jun battled the times, and pi has been solved! ”

"Pi!?" Liu Jin took a deep breath.

Although he used to read mainly the scriptures, he had also heard of pi.

This is a problem for mathematicians in the world since the pre-Qin period!

Back then, when Yushi Dafu Erkuan was alive, he often sighed that he couldn't solve the mystery of pi.

This piece of weight actually unraveled it?

Liu Jin only felt that his brain was a little dizzy.

It's incredible!

"Yes!" The other party is extremely proud, as if he is honored: "Zhang Jun is talented, unparalleled in the world, he not only solved pi, but also made his solution public, and what I admire even more is that Zhang Jun did not sweep himself away like others and hide the secret art, but gave us the decision of this abacus and abacus!" ”

"Brother Xian came a little late, if he came two days early, he would have been able to hear the moment when Zhang Jun taught the abacus formula......" This person sighed with emotion in his mouth: "When it is, Xu Hui bows his head, Wu Yuan worships, and all living beings worship him!" It's almost like Zhong Ni's "Spring and Autumn" and Zi Xia's ......"

For the scholars of the Han family, the scene at that time was indeed a moment when they felt extremely proud.

After the aristocratic princes, the children of proud families who once flaunted their might and regarded the poor as nothing.

In front of Zhang Jun, he could only bow his head and bow down.

This undoubtedly proves to them a fact: the scholars of the poor family can also counterattack the noble families of the princes!

As long as you work hard, you will be counted as Zhang Zizhong, let the children of the family bow down, and let the princes worship later.

At least it can make them face up to themselves!

Liu Jin listened, and he was also a little fascinated.

Who is Wu Yuan? He didn't know.

But he has also heard of Xu Hui's name, which is said to be a talented young mathematician.

"Abacus?" Liu Jin asked suspiciously, "But it's like a recipe?" ”

"Yes!" The man replied, "It's just easier to remember and easier to use than the arithmetic......

"If you are interested, you can go to the wall outside Zhang Jun's house and see for yourself!"

"Although it is only a mantra for addition and subtraction for the time being, it is catchy and easy to understand......

"Zhang Jun will talk more about the way of multiplication and division tomorrow, and the decision of multiplication and division ......" This person said with a longing face: "At that time, I really don't know what kind of grand occasion it should be!" ”

Because of the abacus and the bowing of Yuan Chang, Xu Hui and others.

Especially Yuan Chang and Xu Hui bowed their heads, the name of Zhang Zizhong of this Jiating Pavilion was already known to everyone in this Ba Shangyuan.

At that time, perhaps, even the three elders of the county will come here.

With the passage of time, there is no doubt that in the next few months, the name of Zhang Zizhong in Jiating will continue to spread, and may even spread to Luoyang, Linzi, Suiyang and even Jicheng.

After Liu Jin listened, his face was full of surprise.

He muttered to himself, "No wonder my grandfather values and appreciates this ...... so much He is really a genius! ”

Addition, subtraction, multiplication and division, the foundation of mathematics.

Even his teachers had told him that the way of mathematics, the cause of the Holy King, must be important!