division 2 numbers in Assembly language

.model small
.stack 100h
.code
start:
mov ah,1h
int 21h
sub al,30h

mov bh,al

mov ah,1h
int 21h
sub al,30h

mov ah,0
div bh

mov dl,al
add dl,30h

mov ah,2h
int 21h

mov ah,4ch
int 21h

end start