#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>
#include <cassert>

using namespace std;
using ll = long long;

int main(){

    int T, A, B;
    cin >> T;

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

    return 0;
}