import math

MOD = 998244353

n = int(input())
c = 0
d = 1

for _ in range(n):
    a, b = map(int, input().split())
    c_new = c * b + a * d
    d_new = d * b
    g = math.gcd(c_new, d_new)
    c = c_new // g
    d = d_new // g

print(c % MOD, d % MOD)