import sys
import math

MOD = 998244353

def main():
    input = sys.stdin.read().split()
    ptr = 0
    N = int(input[ptr])
    ptr += 1
    current_num = 0
    current_den = 1
    for _ in range(N):
        A = int(input[ptr])
        B = int(input[ptr+1])
        ptr += 2
        new_num = current_num * B + current_den * A
        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)

if __name__ == "__main__":
    main()