Magic with the number 9

Magic with the number 9 : Rules
1. Take an unrepeated same digit as a number. (don't take like this 2222, its make result as an infinity.)
2. Reverse that number.
3. Subtract the biggest to smallest number.
4. Now you can divide that result by 9.
(In rule 4 tells, the result exactly divide by 9, no reminders)

Example
1. The number is 85264
2. Reverse of this number 46258
3. Big - small (85264 - 46258 = 39006)
4. 39006 / 9 = 4334

Note:
You can use this trick 2 digit to many digits