.MODEL SMALL
        .CODE
        .STARTUP

        MOV AX, 2
        MOV BX, 3
        CALL MUL_AX_BX
        
        CALL DIV_AX_BX
        .EXIT

MUL_AX_BX PROC NEAR
          PUSH DX ; the content of DX will be overwritten
                  ; save DX on the stack
          IMUL BX

          POP DX  ; restore DX
          RET     ; result is in AX
MUL_AX_BX ENDP

DIV_AX_BX PROC FAR USES DX
          CWD     ; sign-extend AX
          IDIV BX
          RET
DIV_AX_BX ENDP

        END