#include <iostream>
#include<bits/stdc++.h>
using namespace std;

int main() {
 long long  n;
   cin>> n;
   while(n--)
   {
   long long a,b ;
    cin>>a>>b;
    if (a==b)
    {
        if((a*b)%2==0)
        cout<<"YES"<<" "<<(a*b)/2;
        else
        cout<<"NO";
    }
    else
    {
    cout<<"NO";
    }
    cout <<endl;

   }

    return 0;
}