t = int(input())
for i in range(t):
    n,a,b = list(input().split())
    if int(a)*int(b)==int(n):
        if (len(a) == len(n)/2) and (len(b) == len(n)/2):
            if ((int(a)%10) != 0) or ((int(b)%10) != 0):
                if sorted(list(a+b)) == sorted(list(n)):
                    print("YES")
                else:
                    print("NO")
            else:
                print("NO")
        else:
            print("NO")
    else:
        print("NO")