The multiplication table is a simple multiplication table from "one to one" to "998 1", which is derived from the multiplication formula and is convenient for multiplication calculation.
The formula of multiplication is the basic calculation rule of multiplication, division and square root in ancient China, which has been used for more than two thousand years. Sentences such as "3927", "684 18", "483 12" and "6636" can be found in books such as Xunzi, Guanzi, Huainanzi and Warring States Policy.
Extended data
16 got 6,262,368,4624,5630,6636.
17 is 7,274,3721,4728,5735,6742,7749.
18 has 8,286,3824,48312,5840,68418,78516,8864.
Nine-tenths, 298,3927,4936,59415,6954,79613,8972,9981.