This is a formula to convert radix 16 into radix 10, where 16 in brackets indicates that the previous F2E93 is radix 16, F= 15, 2=2 and E= 14. So the number calculated by F2e93 (16 163+14 *162+9 *16+3 is the number corresponding to this hexadecimal number, and the hexadecimal number is/. The six letters F are used to represent 10,1,12, 13, 14, 15 respectively. Letters are case-insensitive. Our daily decimal system of 10 is from 10 to 1, so we will calculate it according to 10, for example: 323242 = 3 *10 5+2 *10 4+3. Then the conversion of 16 is equivalent to replacing the above 10 with 16.

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