#include<bits/stdc++.h>
using namespace std;
int main()
{
    long long t,a,c,n,d,i,j,k,l;
    cin>>t;
    while(t--)
    {
        cin>>n>>k;
        a=(k-1)/(n-1);
        c=k+a;
        cout<<c<<endl;
    }
    return 0;
}