In my assembly calculator code, I’m encountering a continuous addition operation instead of other arithmetic operations. It seems like there is an issue with the logic that handles different operations. I need assistance in debugging and correcting this problem to ensure that all arithmetic operations function correctly.

SYS_EXIT equ 1
SYS_READ equ 3
SYS_WRITE equ 4
STDIN equ 0
STDOUT equ 1

section .data
  msg1 db "Enter a digit: ", 0xA,0xD
  len1 equ $ - msg1
  
  msg2 db "Please enter a second digit: ", 0xA,0xD
  len2 equ $ - msg2

  msg3 db "Enter the operation (+, -, *, /): ", 0xA,0xD
  len3 equ $ - msg3

  msg4 db "The result is: "
  len4 equ $ - msg4

segment .bss
  num1 resb 1
  num2 resb 1
  operation resb 1
  result resb 1

section .text
  global main
main:
  mov eax, SYS_WRITE
   mov ebx, STDOUT
   mov ecx, msg1
   mov edx, len1
   int 0x80

   mov eax, SYS_READ
   mov ebx, STDIN
   mov ecx, num1
   mov edx, 2
   int 0x80

   mov eax, SYS_WRITE
   mov ebx, STDOUT
   mov ecx, msg3
   mov edx, len3
   int 0x80

   mov eax, SYS_READ
   mov ebx, STDIN
   mov ecx, operation
   mov edx, 2
   int 0x80

   mov eax, SYS_WRITE
   mov ebx, STDOUT
   mov ecx, msg2
   mov edx, len2
   int 0x80

   mov eax, SYS_READ
   mov ebx, STDIN
   mov ecx, num2
   mov edx, 2
   int 0x80

  mov al, [num1]
  sub al, '0'
  mov bl, [num2]
  sub bl, '0'

  mov cl, [operation]
  mov dl, '+'
  cmp cl, dl
  je addition

  mov dl, '-'
  cmp cl, dl
  je subtraction

  mov dl, '*'
  cmp cl, dl
  je multiplication

  mov dl, '/'
  cmp cl, dl
  je division

  addition:
    add al, bl
        add al, '0'
    mov [result], al
    jmp print_result

  subtraction:
    sub al, bl
        add al, '0'
    mov [result], al
    jmp print_result

  multiplication:
    imul bl
        add al, '0'
    mov [result], al
    jmp print_result

  division:
    mov ah, 0  ; Clear AH before division
    cbw        ; Extend AL (signed) to AX
    cwd        ; Extend AX (signed) to DX:AX
    idiv bl    ; Signed division
    mov [result], al

  print_result:
    mov eax, SYS_WRITE
     mov ebx, STDOUT
     mov ecx, msg4
     mov edx, len4
     int 0x80

     mov eax, SYS_WRITE
     mov ebx, STDOUT
     mov ecx, result
     mov edx, 2
     int 0x80

  mov eax, SYS_EXIT
  xor ebx, ebx
  int 0x80