#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;

int main()
{
    int T;
    scanf("%d",&T);
    while(T--)
    {
        int x,y;
        scanf("%d%d",&x,&y);
        int a=2*x*y;
        if(a<0)
            a=-2*x*y;
        cout<<a<<endl;

    }
}