lab1_ass

 org 100h
start:
                mov ah, $09
                mov dx, prog_name
                int 21h

                mov ah, $02
                mov dx, 0x0D0A
                int 21h

                mov ah, $09
                mov dx, info_str
                int 21h

                mov ah, $02
                mov dx,  0x0D0A
                int 21h

                mov ah, $09
                mov dx, result_is
                int 21h

                mov ax, [a] ;ãðóçèì a â AX
                mov cx, [b] ;ãðóçèì b â CX
                sub ax, $08 ;îòíèìàåì îò à 8
                mul cx      ;óìíîæàåì (a-8)*b, ðåçóëüòàò â DX:AX
                mov bx, [c] ;ãðóçèì â BX c
                add ax, bx   ;ñêëàäûàåì (a-8)*b ñ c
                mov cx,[d]  ;ãðóçèì â CX d
                add cx, $04 ;äîáàâëÿåì ê d 4
                div cx      ;äåëèì AX íà CX (ò.å. (a-8)*b+c)/(d+4). ðåçóëüòàò â DX:AX
                mov [res],ax ;ñîõðàí¤åì ðåçóëüòàò (ìëàäøóþ ÷àñòü) â ÿ¾ res

                mov ax, [res]
                add ax, '0'

                mov bx,ax

                mov ah, $02
                mov dx,bx
                int 21h

                mov ah,$08
                int 21h
                ret

prog_name       db "This program calculates ((a-8)*b+c)/(d+4)$"
info_str        db "where a=1, b=3, c=3, d=2$"
result_is       db "result is equal to $"
a               dw 11h
b               dw 3h
c               dw 3h
d               dw 2h
res             dw 0h