#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll=long long;
using Graph=vector<vector<int>>;
#define MAX 2000000
#define MOD 998244353
#define INF 1000000000

int main(){
  int T;
  cin>>T;
  for(int t=0;t<T;t++){
    int A,B;
    cin>>A>>B;
    cout<<A*B+B<<'\n';
  }
}