#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<cmath>
#include<vector>
#include<queue>
#include<map>
#define inf 0x3f3f3f3f
#define mod 9999991
using namespace std;
void fre(){freopen("d://input.txt","r",stdin);freopen("d://output.txt","w",stdout);}
#define MS(x,y) memset(x,y,sizeof(x))
#define rep(i,x,y) for (int i=x;i<=y;i++)
typedef __int64  LL;
const int N=205;

int main(){
int t;
int x,y;
scanf("%d",&t);
while(t--){
    scanf("%d %d",&x,&y);
    int ans=0;
    printf("%d\n",x*y*2);

}

return 0;
}