#pragma comment(linker, "/STACK:1024000000,1024000000")
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<vector>
#include<map>
#include<deque>
#include<functional>
#include<iterator>
#include<set>
#include<utility>
#include<stack>
#include<queue>
#include<bitset>
using namespace std;
#define maxn 800005
#define inf 1500000007
using namespace std;
int main()
{
    int i,j,k,x,y,T;
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d%d",&x,&y);
        printf("%d\n",2*x*y);
    }
    return 0;
}