import math
# (0, 0, 0) -> (A, B, C)
T = int(input())
MOD = 998244353
for _ in range(T):
    A, B, C = map(int, input().split())
    d = A**2+B**2+C**2
    print((d * pow(C, -1, MOD) ** 2) % MOD)