Around AD 190 (about the Eastern Han Dynasty), China's figures of quantity were completely recorded in an ancient book called Number Theory. These figures include one, two, three, four, five, six, seven, eight, nine, ten, one hundred, one thousand, ten thousand (one thousand) and one hundred million (one hundred million).
The largest "pole" in China's numerical notation is not recorded in this book, but it is often used to express the concept of infinity. During the Tang Dynasty, a new member was added: Dashu. Part of it was borrowed from Sanskrit in ancient India, which originally corresponded to decimal, and later expanded to new numbers.
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Because of the different ages, the numbers represented by the corresponding digital units have also been divided, such as Ganges sand.
Quadratic system (1 billion, 1 billion): the power of 10/4, that is, the power of 10/6384.
Universal system (billion, trillion): stands for the 52nd power of 10. The largest number in ancient Indian counting units.
The decimal principle of each large number unit is a decimal below 10 thousand; More than 10,000 people are divided. Specifically, it is divided into upper number (self-multiplying system); Median (decimal); Countdown (decimal).
Among them, the median principle has been retained and used in Japan, South Korea, Singapore and Taiwan Province Province.
In the principle of large numbers, 1000 billion means1kloc-0/1,which is consistent with the median principle. And one trillion refers to 10 15 (quadrillion in English), which means one trillion in the median.
The megameter (symbol Mm) in the length unit is one thousand kilometers (10 6m), that is, one million meters, which belongs to the principle of the next number. In China, mega characters are commonly used in English to refer to Mi affixes (10 6), such as: Million (physical unit) Mebibyte (byte unit).