#include<iostream>
using namespace std;
bool solve(int& w)
{
	int w1,w2,d1,d2;
	bool b1=1,b2=1;
	cin>>w1>>d1>>w2>>d2;
	if(!w1) b1=solve(w1);
	if(!w2) b2=solve(w2);
	w=w1+w2;
	return b1&b2&&(w1*d1==w2*d2);
}
int main()
{
	int t,w;
	cin>>t;
	while(t--)
	{
		if(solve(w)) cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
		if(t) cout<<endl;
	}
	return 0;
}