#include<cstdio>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<queue>
#include<string>
#include<map>
#include<set>
#include<iostream>
#define son e[i].t
#define ls (p << 1) 
#define rs (p << 1) | 1
#define mp make_pair
#define fr first
#define sc second
#define maxn 10010
typedef long long ll;
using namespace std;
int T, x, y;
int main()
{
    scanf("%d", &T);
    while (T --){
        scanf("%d%d", &x, &y);
        printf("%d\n", 2 * x * y);
    }
    return 0;
}