func_code_string: #include <bits/stdc++.h>   using namespace std;   long long full, n, k, x, i, ans, a[100001], b[100001];   void f(long long l, long long r, long long d) {     if (l > r) return;     if (l == 0)       ans += r / d + 1;     else       ans += (r / d) - (l - 1) / d;   }   int main() {     cin >> n >> k;     for (i = 1; i <= n / k; i++) {       cin >> a[i];     }     x = 1;     for (i = 1; i < k; i++) x *= 10;     for (i = 1; i <= n / k; i++) {       cin >> b[i];     }     full = 1;     for (i = 1; i <= n / k; i++) {       ans = 0;       f(0, b[i] * x - 1, a[i]);       f((b[i] + 1) * x, 10 * x - 1, a[i]);       full = ans * full % 1000000007;     }     cout << full;     return 0;   }   