#include <cstring>
#include <iostream>
#include <limits>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <limits.h>
#include <stdint.h>
#include <ctype.h>

using namespace std;

using ll = long long;

void makeCount(const char* str, int* counts) {
    while (*str != '\0') {
        counts[*(str++) - '0'] += 1;
    }
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int n;
    cin >> n;

    for (int i = 0; i < n; i++) {
        ll big, a, b;
        cin >> big >> a >> b;

        int smallCounts[10] {};
        int bigCounts[10] {};

        if (a * b != big) {
            cout << "NO\n";
            continue;
        }

        string bigStr = to_string(big);

        if (bigStr.length() % 2 != 0) {
            cout << "NO\n";
            continue;
        }

        size_t k = bigStr.length() / 2;
        string aStr = to_string(a);
        string bStr = to_string(b);

        if (aStr.length() != k || bStr.length() != k) {
            cout << "NO\n";
            continue;
        }

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

        makeCount(aStr.c_str(), smallCounts);
        makeCount(bStr.c_str(), smallCounts);
        makeCount(bigStr.c_str(), bigCounts);

        bool bad = false;

        for (int j = 0; j < 10; j++) {
            if (smallCounts[j] != bigCounts[j]) {
                cout << "NO\n";
                bad = true;
                break;
            }
        }

        if (!bad) {
            cout << "YES\n";
        }
    }

    return 0;
}