The multiplication sign was first expressed by William Oughtred, a British mathematician, in his book Keys to Mathematics in 163 1, which became more and more popular in modern times.

In the letter 1698 to johann bernoulli on July 29th, Leibniz proposed to use the dot "x" to represent multiplication, in case "x" is confused with the letter "x".

Multiplication symbol is a special symbol, and many people use "*" instead when typing. Actually, you can enter a multiplication sign.

1. Enter v 1 with the intelligent ABC input method, and you will find the multiplication sign on the fourth page.

2. Enter "Cheng" or "C" directly in the new version of Sogou Pinyin Input Method, or select the multiplication sign in the candidate box to output.

3. Press the Alt key in the English input state, then press "2 15" on the numeric keypad, and then release the Alt key and an "×" will appear.

4. Enter "Cheng Hao" in Baidu input method, and you can also find "x".