func_code_string: #include <bits/stdc++.h>   using namespace std;   long long M = 1000000007;   long long power(long long a, long long b) {     long long res = 1;     for (long long i = 0; i < b; i++) res = (res * a) % M;     return res;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     long long t, n, m, k, i, x, ara[100], ans;     cin >> t;     while (t--) {       cin >> n >> k;       x = 0;       m = k;       ans = 0;       while (m != 0) {         ara[x] = m % 2;         x++;         m /= 2;       }       for (i = 0; i < x; i++) {         if (ara[i] == 1) ans = ((ans % M) + power(n, i)) % M;       }       cout << ans <<   n ;     }     return 0;   }   