#include <iostream>
#include <cstdio>
#include <cstring>
#include <string>
#include <cmath>
#include <algorithm>
#include <queue>
using namespace std;

#define mem(a) memset(a,0,sizeof(a))
const int maxn = 100005;

int main()
{
    int t;
    int x,y;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d%d",&x,&y);
        cout<<x*y*2<<endl;
    }
    return 0;
}