K-th Not Divisible by n || Codeforces

#include <bits/stdc++.h>
using namespace std;

int main() {
    int t, n, k;
    cin >> t;
    while(t--) {
        cin >> n >> k;
        double div = (k - 1) / (double) (n - 1);
        int result = k + floor(div);
        cout << result << endl;;
    }

    return 0;
}