multiplying a number more than 3 give wrong answer in assembly 8086 [duplicate]

Question

I try to write a multiply code from c to assembly from 1 to 50 like:

1 MUL 1
2 MUL 2 

and so on but when its 4 MUL 4 doesn't give a right number it give me the character @.

I wrote it in assembly 8086 code can you help me to know where is the problem cause I am new at it

.MODEL SMALL
.DATA
Y DW 50 DUP (?) 
.CODE
MOV AX,@DATA
MOV DS,AX   
MOV WORD PTR SI,OFFSET Y
MOV Cx,1
L1:     
MOV Ax,Cx 
IMUL Ax  
ADD Ax,30H
MOV [SI],Ax
MOV Dx,[SI]
ADD SI,2         
MOV Ah,02H  
INT 21H 
INC Cx
CMP Cx,51
JE L2
JMP L1
L2:
.EXIT 
END

Answer 1

You appear to be adding 30h to the result to translate the value to an ASCII digit character. That wil clearly only work for single digit results 0 to 9.

It is not the multiplication that is in error, it is your output method that is flawed. Outputting a human readable result to the console is the most complex part of this task by far.