section .data
    prompt_b db 'Enter the value of b: ', 0
    prompt_c db 'Enter the value of c: ', 0
    prompt_d db 'Enter the value of d: ', 0
    result_msg db 'Result: ', 0
 
section .bss
    b resd 1
    c resd 1
    d resd 1
    result resd 1
 
section .text
    global _start
 
_start:
    ; Prompt user for input b
    mov eax, 4
    mov ebx, 1
    mov ecx, prompt_b
    mov edx, 21
    int 0x80
 
    ; Read input b
    mov eax, 3
    mov ebx, 0
    mov ecx, b
    mov edx, 4
    int 0x80
 
    ; Prompt user for input c
    mov eax, 4
    mov ebx, 1
    mov ecx, prompt_c
    mov edx, 21
    int 0x80
 
    ; Read input c
    mov eax, 3
    mov ebx, 0
    mov ecx, c
    mov edx, 4
    int 0x80
 
    ; Prompt user for input d
    mov eax, 4
    mov ebx, 1
    mov ecx, prompt_d
    mov edx, 21
    int 0x80
 
    ; Read input d
    mov eax, 3
    mov ebx, 0
    mov ecx, d
    mov edx, 4
    int 0x80
 
    ; Convert input to integers
    mov eax, [b]
    sub eax, '0'
    mov [b], eax
 
    mov eax, [c]
    sub eax, '0'
    mov [c], eax
 
    mov eax, [d]
    sub eax, '0'
    mov [d], eax
 
    ; Calculate expression: 3b - 12c/d
    mov eax, [b]        ; eax = b
    imul eax, 3         ; eax = 3b
 
    mov ebx, [c]        ; ebx = c
    imul ebx, 12        ; ebx = 12c
 
    mov ecx, [d]        ; ecx = d
    idiv ecx            ; eax = 12c/d
 
    sub eax, ebx        ; eax = 3b - 12c/d
 
    mov [result], eax
 
    ; Display result
    mov eax, 4
    mov ebx, 1
    mov ecx, result_msg
    mov edx, 8
    int 0x80
 
    mov eax, 4
    mov ebx, 1
    mov ecx, [result]
    mov edx, 4
    int 0x80
 
    ; Exit
    mov eax, 1
    xor ebx, ebx
    int 0x80
 

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