How to convert decimal numbers into decimal numbers?

Write the radix on each bit of a 3-digit hexadecimal number, written as: unit 1, high = low *9.

8 1? 9? 1? Write down the number to be converted in the bit alignment below.

8? 5? 0? The result of multiplication of upper and lower bits in this formula adds up to 8 * 81+5 * 9+0 *1= 648+45 = 693, so (850)9=693D.

As long as the radix is written on every bit of the N-ary, the conversion can be simply completed according to the above calculation. The radix of the N system is written as: unit bit 1, high bit = low bit *n, and the decimal system is also calculated in this way.