func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = 100005;   int a[MAXN], b[MAXN];   int main() {     int n, k;     scanf( %d%d , &n, &k);     for (int i = 0; i < n / k; ++i) {       scanf( %d , &a[i]);     }     for (int i = 0; i < n / k; ++i) {       scanf( %d , &b[i]);     }     long long ans = 1;     int mx = 10;     for (int i = 1; i < k; ++i) {       mx *= 10;     }     int mn = mx / 10;     --mx;     for (int i = 0; i < n / k; ++i) {       int cur = mx / a[i];       int l = b[i] * mn, r = (b[i] + 1) * mn - 1;       if (r >= l) {         cur -= r / a[i];         if (l > 0) cur += (l - 1) / a[i];       }       if (b[i] != 0) ++cur;       ans = (ans * (long long)cur) % 1000000007;     }     printf( %I64d , ans);     return 0;   }   