import sys
import math

MOD = 998244353

def main():
    n = int(sys.stdin.readline())
    a = 0
    b = 1
    for _ in range(n):
        ai, bi = map(int, sys.stdin.readline().split())
        new_a = a * bi + ai * b
        new_b = b * bi
        g = math.gcd(new_a, new_b)
        a = new_a // g
        b = new_b // g
    print(a % MOD, b % MOD)

if __name__ == "__main__":
    main()