......
mov a,variable
mov b,#100
div ab
mov digit1,a ; save first digit
mov a,b
mov b,#10
div ab
mov digit2,a ; save 2nd digit
mov digit3,b ; save 3rd digit
......

variable is the ASCII in hexadecimal. You can use digit1,digit2,and digit3 at internal RAM of Microcontroller like 30h,31h, and 32h.

best regards