import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        long testcases = in.nextLong();
        for(int i = 0; i < testcases; i++){
            Node start = new Node();
            if(start.Balanced())
                System.out.println("YES");
            else
                System.out.println("NO");
            System.out.println();
        }
    }
}
class Node {
    public long Wl, Dl, Wr, Dr;
    public Node(){
        Scanner in = new Scanner(System.in);
        Wl = in.nextLong();
        Dl = in.nextLong();
        Wr = in.nextLong();
        Dr = in.nextLong();
    }

    public boolean Balanced(){
        if(WeightL() * Dl == WeightR() * Dr){
            return true;
        }
        else return false;
    }

    public long WeightL(){
        if(Wl == 0){
            Node child = new Node();
            Wl = child.WeightL() + child.WeightR();
        }
        return Wl;
    }

    public long WeightR(){
        if(Wr == 0){
            Node child = new Node();
            Wr = child.WeightL() + child.WeightR();
        }
        return Wr;
    }
}