import math

MOD = 998244353

n = int(input())
current_num = 0
current_den = 1

for _ in range(n):
    a, b = map(int, input().split())
    new_num = current_num * b + a * current_den
    new_den = current_den * b
    g = math.gcd(new_num, new_den)
    current_num = new_num // g
    current_den = new_den // g

print(current_num % MOD, current_den % MOD)