DOSSEG
.MODEL small
.STACK 200h
	
.DATA
n DB 5
result DB ?
	
.CODE
Begin:

MOV AX,@data
MOV DS,AX
MOV AL,1
MOV CL,n
boucle:
MUL CL
DEC CL
CMP CL,0
JE fin
JMP boucle

	
fin:

MOV result,AL
MOV AH,4Ch
int 21h
END Begin