#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll MOD = 1000000007;
using P = pair<int,int>;
#define rep(i, n) for(int i = 0; i < n; i++)
#define all(x) (x).begin(),(x).end()

int main(){
    int t;
    cin >> t;
    rep(i,t){
        int a,b;
        cin >> a >> b;
        cout << b + a * b << endl;
    }
    return 0;
}