What do you mean by doubling?

Doubling is the original number multiplied by 2, which is twice the original number. For example, in 1980, the total GDP of China was 5 trillion, and doubling it is 5 trillion times 2, which is 10 trillion. Quadrupling times 4, tripling times 8.

Fan means "time" in Cantonese. Guangdong Mahjong has been said several times. Doubling is different from doubling. Assuming that it was 1, multiplying n is 1 * 2 n, and multiplying n is 1*( 1+n), doubling is to double on the original basis. Originally it was 100, but it was 200 after doubling.

"Turn n times" is to multiply 2 to the n power.

For example:

Tripping for three times: 3 * 2 3 = 24.

The annual output value quadrupled 1 00000,000,000,000 yuan14,000,000 yuan quadrupled/kloc-0,000 times (2 to the third power =8), and the result was 80 million yuan.

Other meaning:

"Fan" also refers to remote ethnic minorities or foreign countries. This means that when the emperor of China receives the representatives of these tribes, he often arranges them in two rows, and the emperor walks between the two rows, asking questions and talking with the representatives alternately while walking. These distant tribal representatives who let the emperor meet alternately left and right, or the tribes they represent, are always called "Fan", and their respective titles are always called "Number". The words of foreigners are always called "Fan Hua".

Translating into Chinese is also called "Fan" (that is, "Fan"), because the translation is in the middle, the foreign representative is on the left and the emperor is on the right. The interpreter turns his head to the foreign representative, and then turns his head to the emperor to translate Fan Hua, that is, the interpreter's head needs to do the same thing alternately from left to right, so interpretation is also called "turning".