user: 这段汇编代码用C语言表示是什么样的:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x620,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  jmp    L121
L46:
  lea    -0x500(%rbp),%rax
  mov    %rax,%rdi
  call   <gets@plt>
  lea    -0x600(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %ax,-0x60a(%rbp)
  lea    -0x500(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %ax,-0x608(%rbp)
  movw   $0x0,-0x612(%rbp)
  jmp    L110
L141:
  movswl -0x612(%rbp),%eax
  cltq
  movb   $0x0,-0x400(%rbp,%rax,1)
  movswl -0x612(%rbp),%eax
  cltq
  movb   $0x0,-0x200(%rbp,%rax,1)
  movzwl -0x612(%rbp),%eax
  add    $0x1,%eax
  mov    %ax,-0x612(%rbp)
L110:
  movswl -0x612(%rbp),%eax
  movswl -0x60a(%rbp),%ecx
  movswl -0x608(%rbp),%edx
  add    %ecx,%edx
  cmp    %edx,%eax
  jl     L141
  movw   $0x0,-0x60c(%rbp)
  movzwl -0x608(%rbp),%eax
  sub    $0x1,%eax
  mov    %ax,-0x612(%rbp)
  jmp    L122
L33:
  movw   $0x0,-0x60e(%rbp)
  movw   $0x0,-0x60c(%rbp)
  movzwl -0x60a(%rbp),%eax
  sub    $0x1,%eax
  mov    %ax,-0x610(%rbp)
  jmp    L76
L197:
  movswl -0x612(%rbp),%eax
  cltq
  movzbl -0x500(%rbp,%rax,1),%eax
  movsbl %al,%eax
  sub    $0x30,%eax
  mov    %eax,%edx
  movswl -0x610(%rbp),%eax
  cltq
  movzbl -0x600(%rbp,%rax,1),%eax
  movsbl %al,%eax
  sub    $0x30,%eax
  imul   %eax,%edx
  movzwl -0x60e(%rbp),%eax
  add    %edx,%eax
  mov    %ax,-0x602(%rbp)
  cmpw   $0xa,-0x602(%rbp)
  jne    L45
  movswl -0x60c(%rbp),%eax
  cltq
  movb   $0x0,-0x400(%rbp,%rax,1)
  movw   $0x1,-0x60e(%rbp)
  jmp    L145
L45:
  movzwl -0x602(%rbp),%edx
  movswl %dx,%eax
  imul   $0x6667,%eax,%eax
  shr    $0x10,%eax
  sar    $0x2,%ax
  mov    %edx,%esi
  sar    $0xf,%si
  sub    %esi,%eax
  mov    %eax,%ecx
  mov    %ecx,%eax
  shl    $0x2,%eax
  add    %ecx,%eax
  add    %eax,%eax
  mov    %edx,%ecx
  sub    %eax,%ecx
  movswl -0x60c(%rbp),%eax
  mov    %ecx,%edx
  cltq
  mov    %dl,-0x400(%rbp,%rax,1)
  movzwl -0x602(%rbp),%eax
  movswl %ax,%edx
  imul   $0x6667,%edx,%edx
  shr    $0x10,%edx
  sar    $0x2,%dx
  sar    $0xf,%ax
  mov    %eax,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  mov    %ax,-0x60e(%rbp)
L145:
  movzwl -0x60c(%rbp),%eax
  add    $0x1,%eax
  mov    %ax,-0x60c(%rbp)
  movzwl -0x610(%rbp),%eax
  sub    $0x1,%eax
  mov    %ax,-0x610(%rbp)
L76:
  cmpw   $0x0,-0x610(%rbp)
  jns    L197
  cmpw   $0x0,-0x60e(%rbp)
  je     L82
  movzwl -0x60c(%rbp),%eax
  mov    %eax,%edx
  add    $0x1,%edx
  mov    %dx,-0x60c(%rbp)
  cwtl
  movzwl -0x60e(%rbp),%edx
  cltq
  mov    %dl,-0x400(%rbp,%rax,1)
  movw   $0x0,-0x60e(%rbp)
L82:
  movzwl -0x608(%rbp),%eax
  movzwl -0x612(%rbp),%edx
  sub    %edx,%eax
  sub    $0x1,%eax
  mov    %ax,-0x606(%rbp)
  movzwl -0x606(%rbp),%eax
  mov    %ax,-0x610(%rbp)
  jmp    L114
L162:
  movswl -0x610(%rbp),%eax
  cltq
  movzbl -0x200(%rbp,%rax,1),%eax
  movsbw %al,%dx
  movswl -0x610(%rbp),%eax
  movswl -0x606(%rbp),%ecx
  sub    %ecx,%eax
  cltq
  movzbl -0x400(%rbp,%rax,1),%eax
  cbtw
  add    %edx,%eax
  mov    %eax,%edx
  movzwl -0x60e(%rbp),%eax
  add    %edx,%eax
  mov    %ax,-0x604(%rbp)
  cmpw   $0x9,-0x604(%rbp)
  jle    L64
  movzwl -0x604(%rbp),%eax
  lea    -0xa(%rax),%edx
  movswl -0x610(%rbp),%eax
  cltq
  mov    %dl,-0x200(%rbp,%rax,1)
  movw   $0x1,-0x60e(%rbp)
  jmp    L35
L64:
  movswl -0x610(%rbp),%eax
  movzwl -0x604(%rbp),%edx
  cltq
  mov    %dl,-0x200(%rbp,%rax,1)
  movw   $0x0,-0x60e(%rbp)
L35:
  movzwl -0x610(%rbp),%eax
  add    $0x1,%eax
  mov    %ax,-0x610(%rbp)
L114:
  movswl -0x610(%rbp),%eax
  movswl -0x60c(%rbp),%ecx
  movswl -0x606(%rbp),%edx
  add    %ecx,%edx
  cmp    %edx,%eax
  jl     L162
  cmpw   $0x0,-0x60e(%rbp)
  je     L44
  movzwl -0x610(%rbp),%eax
  mov    %eax,%edx
  add    $0x1,%edx
  mov    %dx,-0x610(%rbp)
  cwtl
  movzwl -0x60e(%rbp),%edx
  cltq
  mov    %dl,-0x200(%rbp,%rax,1)
L44:
  movzwl -0x612(%rbp),%eax
  sub    $0x1,%eax
  mov    %ax,-0x612(%rbp)
L122:
  cmpw   $0x0,-0x612(%rbp)
  jns    L33
  movw   $0x0,-0x60c(%rbp)
  movzwl -0x610(%rbp),%eax
  sub    $0x1,%eax
  mov    %ax,-0x612(%rbp)
  jmp    L156
L96:
  movswl -0x612(%rbp),%eax
  cltq
  movzbl -0x200(%rbp,%rax,1),%eax
  test   %al,%al
  je     L177
  movw   $0x1,-0x60c(%rbp)
L177:
  cmpw   $0x0,-0x60c(%rbp)
  je     L187
  movswl -0x612(%rbp),%eax
  cltq
  movzbl -0x200(%rbp,%rax,1),%eax
  add    $0x30,%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <putchar@plt>
L187:
  movzwl -0x612(%rbp),%eax
  sub    $0x1,%eax
  mov    %ax,-0x612(%rbp)
L156:
  cmpw   $0x0,-0x612(%rbp)
  jns    L96
  cmpw   $0x0,-0x60c(%rbp)
  jne    L32
  mov    $0x30,%edi
  call   <putchar@plt>
L32:
  mov    $0xa,%edi
  call   <putchar@plt>
L121:
  lea    -0x600(%rbp),%rax
  mov    %rax,%rdi
  call   <gets@plt>
  test   %rax,%rax
  jne    L46
  nop
  mov    -0x8(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L132
  call   <__stack_chk_fail@plt>
L132:
  leave
  ret
```

assistant: ```c
void main() {
  char a[251], b[251], m[502], ra[502];
  short la, lb, i, j, max, ml, ad, carry, lt, dif;
  while (gets(a)) {
    gets(b);
    la = strlen(a);
    lb = strlen(b);
    for (i = 0; i < la + lb; i++) {
      m[i] = 0;
      ra[i] = 0;
    }
    lt = 0;
    for (i = lb - 1; i >= 0; i--) {
      carry = 0;
      lt = 0;
      for (j = la - 1; j >= 0; j--) {
        ml = (b[i] - '0') * (a[j] - '0') + carry;
        if (ml == 10) {
          m[lt] = 0;
          carry = 1;
        } else {
          m[lt] = ml % 10;
          carry = ml / 10;
        }
        lt++;
      }
      if (carry) {
        m[lt++] = carry;
        carry = 0;
      }
      dif = lb - i - 1;
      for (j = dif; j < lt + dif; j++) {
        ad = ra[j] + m[j - dif] + carry;
        if (ad > 9) {
          ra[j] = ad - 10;
          carry = 1;
        } else {
          ra[j] = ad;
          carry = 0;
        }
      }
      if (carry)
        ra[j++] = carry;
    }
    lt = 0;
    for (i = j - 1; i >= 0; i--) {
      if (ra[i] != 0)
        lt = 1;
      if (lt)
        putchar(ra[i] + '0');
    }
    if (!lt)
      putchar('0');
    putchar('\n');
  }
}
```