1 #include <iostream>
 2 using namespace std;
 3 
 4 bool solve(int& w)
 5 {
 6     int d1,w1,d2,w2;
 7     cin >> w1 >> d1 >> w2 >> d2 ;
 8     bool b1 = true ,b2 = true ;
 9     if(!w1) b1 = solve(w1) ;
10     if(!w2) b2 = solve(w2) ;
11     w = w1 + w2 ;
12     return (b1 && b2 && (w1 * d1 == w2 * d2)) ;    
13 }
14 
15 int main(int argc, char *argv[])
16 {
17     int t,w;
18     scanf("%d",&t) ;
19     while(t--)
20     {
21         if(solve(w)) cout << "YES" << endl;
22         else cout << "NO" << endl ;
23         if(t) cout << endl ;
24     } 
25     return 0;
26 }