UVa839

#pragma warning(disable:4996)
#include<cstdio>
#include<cstring>
#include<string>
#include<cmath>
#include<vector>
#include<algorithm>
#include<iostream>
#include<time.h>
#include<set>
#include<sstream>
#include<functional>
#include<cassert>
#include<list>
#include<iterator>
#include<utility>
#include <stdexcept>
#include <sstream>
#include <fstream>
#include<ctype.h>
#include<map>
#include<stack>
#include<queue>
#include<cstdlib>

using namespace std;

bool solve(int &W)
{
    bool b1 = true;
    bool b2 = true;
    int W1, D1, W2, D2;
    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 W;
    int T;
    cin >> T;
    while (T--)
    {
        W = 0;
        if (solve(W))
            cout << "YES" << endl;
        else
            cout << "NO" << endl;
        if (T)
            cout << "\n";
    }
    return 0;
}