import sys
import math

MOD = 998244353

def main():
    N = int(sys.stdin.readline())
    terms = []
    for _ in range(N):
        A, B = map(int, sys.stdin.readline().split())
        terms.append((A, B))
    
    num = 0
    den = 1
    
    for a, b in terms:
        new_num = (num * b + a * den) % MOD
        new_den = (den * b) % MOD
        
        g = math.gcd(new_num, new_den)
        if g == 0:
            g = 1
        num = new_num // g
        den = new_den // g
        
        num %= MOD
        den %= MOD
    
    print(num % MOD, den % MOD)

if __name__ == '__main__':
    main()