user: Please show me the C implementation that matches the assembly code listed below:

```asm
<main>:
  endbr64
  push   %rbx
  sub    $0x400,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x3f8(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rdi
  lea    D9(%rip),%rsi
  mov    $0x7d,%ecx
  rep movsq %ds:(%rsi),%es:(%rdi)
  movzbl (%rsi),%eax
  mov    %al,(%rdi)
  mov    %rsp,%rbx
  mov    $0x4,%esi
  mov    %rbx,%rdi
  call   <largest_product_in_series@plt>
  cmp    $0x16c8,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    $0x7,%esi
  mov    %rbx,%rdi
  call   <largest_product_in_series@plt>
  cmp    $0x273e88,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    $0xd,%esi
  mov    %rbx,%rdi
  call   <largest_product_in_series@plt>
  mov    $0x0,%edi
  call   <assert@plt>
  mov    $0xf,%esi
  mov    %rbx,%rdi
  call   <largest_product_in_series@plt>
  mov    $0x0,%edi
  call   <assert@plt>
  mov    0x3f8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L3
  mov    $0x0,%eax
  add    $0x400,%rsp
  pop    %rbx
  ret
L3:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: label: D9
type_guessed: string

tool: D9: 7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450

assistant: ```c
int main() {
  char number[] = "73167176531330624919225119674426574742355349194934"
                  "96983520312774506326239578318016984801869478851843"
                  "85861560789112949495459501737958331952853208805511"
                  "12540698747158523863050715693290963295227443043557"
                  "66896648950445244523161731856403098711121722383113"
                  "62229893423380308135336276614282806444486645238749"
                  "30358907296290491560440772390713810515859307960866"
                  "70172427121883998797908792274921901699720888093776"
                  "65727333001053367881220235421809751254540594752243"
                  "52584907711670556013604839586446706324415722155397"
                  "53697817977846174064955149290862569321978468622482"
                  "83972241375657056057490261407972968652414535100474"
                  "82166370484403199890008895243450658541227588666881"
                  "16427171479924442928230863465674813919123162824586"
                  "17866458359124566529476545682848912883142607690042"
                  "24219022671055626321111109370544217506941658960408"
                  "07198403850962455444362981230987879927244284909188"
                  "84580156166097919133875499200524063689912560717606"
                  "05886116467109405077541002256983155200055935729725"
                  "71636269561882670428252483600823257530420752963450";
  assert(5832 == largest_product_in_series(number, 4));
  assert(2571912 == largest_product_in_series(number, 7));
  assert(23514624000 == largest_product_in_series(number, 13));
  assert(282293061120 == largest_product_in_series(number, 15));
  return 0;
}
```