.MODEL  SMALL
.386
.STACK 100H
.DATA
TABLE  DB 0,1,4,9,16,25,36,49,64,81
BUF  DB 'Please input one number (0-9): ',0DH,0AH, '$'
.CODE 
.STARTUP
MOV  DX, OFFSET BUF
MOV  AH,9
INT 21H
MOV AH,1
INT 21H
AND   AL,0FH
MOV  BX, OFFSET  TABLE      
MOV  AH,0
ADD   BX, AX
MOV   AL,[BX]                  
.EXIT  0
END