#include <iostream>
#include <cstdio>
#include <iomanip>
#include <cmath>
#include <string>
#include <cstring>

using namespace std;

int main() {
	int tc;
	cin >> tc;

	long long a, b, n;
	for (int i = 0; i < tc; i++) {
		cin >> n >> a >> b;
		// 1.
		if (a * b != n) {
			cout << "NO" << "\n";
			continue;
		}

		// 2
		size_t l = to_string(a).length();
		size_t r = to_string(b).length();

		if (l != r) {
			cout << "NO" << "\n";
			continue;
		}
		if (to_string(n).length() != l + r) {
			cout << "NO" << "\n";
			continue;
		}

		// 3
		if (a % 10 == 0 && b % 10 == 0) {
			cout << "NO" << "\n";
			continue;
		}

		// 4.
		int nums[10];
		memset(nums, 0, sizeof(nums));
		long long x = a;
		while (x) {
			++nums[x % 10];
			x /= 10;
		}
		x = b;
		while (x) {
			++nums[x % 10];
			x /= 10;
		}
		x = n;
		while (x) {
			--nums[x % 10];
			x /= 10;
		}
		bool valid = true;
		for (int j = 0; j < 10; ++j) {
			if (nums[j] != 0) {
				cout << "NO" << "\n";
				valid = false;
				break;
			}
		}
		if (valid == false) { continue; }
		cout << "YES" << "\n";
	}

	return 0;
}