import sys
import math

MOD = 998244353

def main():
    n = int(sys.stdin.readline())
    numerator = 0
    denominator = 1
    for _ in range(n):
        a, b = map(int, sys.stdin.readline().split())
        new_num = numerator * b + a * denominator
        new_den = denominator * b
        g = math.gcd(new_num, new_den)
        numerator = new_num // g
        denominator = new_den // g
    c = numerator % MOD
    d = denominator % MOD
    print(c, d)

if __name__ == '__main__':
    main()