#include <iostream>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <algorithm>
using namespace std;
int main()
{
    int t,x,y;
    double b,k,s1,s2;
    long long sum;
    cin>>t;
    while(t--)
    {
        cin>>x>>y;
        /*k=-1,b=y-k*x;
        s1=sqrt((x*1.0+b/k)*(x*1.0+b/k)+y*y);
        s2=sqrt(x*x+(y*1.0-b)*(y*1.0-b));
        sum=s1*s2;*/
        sum=2*x*y;
        cout<<sum<<endl;
    }
    return 0;
}