from collections import Counter, defaultdict

N = int(input())

def solve():
    n,a,b = map(int, input().split())

    if n == a * b and len(str(a)) == len(str(b)) and (a % 10 != 0 or b % 10 != 0):
        astr,bstr,nstr = map(str, [a,b,n])

        c = defaultdict(lambda: 0)
        for char in astr+bstr:
            c[char] += 1

        for char in nstr:
            c[char] -= 1


        for x in c:
            if c[x] != 0:
                return False

        return True
    return False


for _ in range(N):
    print("YES" if solve() else "NO")