#include <bits/stdc++.h>
#include <boost/multiprecision/cpp_int.hpp>
using namespace std;
namespace mp = boost::multiprecision;

int main(){
    int T;
    cin>>T;
    for(int i=0;i<T;++i){
        int A,B;
        cin>>A>>B;
        cout<<((A+1)*B)<<endl;
    }
}