func_code_string: #include <bits/stdc++.h>   using namespace std;   int A[100005], B[100005];   long long pwr[15];   int main() {     int n, k, i;     long long res = 1, MOD = 1000000007, c;     cin >> n >> k;     for (i = 0; i < n / k; i++) cin >> A[i];     for (i = 0; i < n / k; i++) cin >> B[i];     for (i = pwr[0] = 1; i <= 10; i++) pwr[i] = 10 * pwr[i - 1];     for (i = 0; i < n / k; i++) {       long long l = pwr[k] - 1;       l = l / A[i] + 1;       long long t1 = pwr[k - 1];       if (B[i]) {         l = l - ((((B[i] + 1) * t1) - 1) / A[i] - ((B[i] * t1) - 1) / A[i]);       } else {         l = l - (((B[i] + 1) * t1) - 1) / A[i] - 1;       }       res = (res * l) % MOD;     }     cout << res;     return 0;   }   