#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
int main()
{
    int t;
    int a,b;
    cin>>t;
    while(t--)
    {
        scanf("%d %d",&a,&b);
        int ans;
       // ans=sqrt(4*a*a*b*b);
        printf("%d\n",2*a*b);
    }
    return 0;
}