The abacus is a traditional computing tool in China, and it is listed as the fifth invention in China. There was no such advanced computing technology in ancient times, so the ancients came up with a way to design an abacus to calculate the books. They can't live without abacus, and they can't live without ancient poetry in spirit. In many TV dramas, some shopkeepers and drugstore owners often use abacus to calculate carefully. Seeing that they are very skilled, they can work out a bill in three or five times, so the owner's profit can be worked out in a few hours at the end of the day.
Actually, when the abacus appeared in China, the ancient Greeks invented it, but the abacus they used was different from that used in China. They used pebbles and sand as plates to calculate, and the ancient Romans used different calculation methods. They will draw several other parallel lines with one line, and finally put stones or operators on them to calculate. Although they all use abacus to calculate data, they are not as advanced and simple as China's calculation method.
Until the Ming Dynasty, a very powerful mathematician appeared. His name is Cheng Dawei. He wrote a famous math book, Arithmetic Unity. He is 1 person who perfected the arithmetic formula very well in the history of China. Later, a series of adjectives about abacus appeared. Like the golden abacus, it is used to describe some people who are careful and frank. The abacus has another meaning. Every new year, people with abacus at home will take it out and calculate it carefully, suggesting that they will make a fortune and become richer in the coming year.