import sys
import math

def main():
    MOD = 998244353
    input = sys.stdin.read().split()
    idx = 0
    N = int(input[idx])
    idx += 1
    A = []
    B = []
    for _ in range(N):
        a = int(input[idx])
        b = int(input[idx + 1])
        A.append(a)
        B.append(b)
        idx += 2

    p = 0
    q = 1
    for a, b in zip(A, B):
        new_p = p * b + a * q
        new_q = q * b
        g = math.gcd(new_p, new_q)
        if g != 0:
            p = new_p // g
            q = new_q // g
        else:
            p = new_p
            q = new_q

    c = p % MOD
    d = q % MOD
    print(c, d)

if __name__ == '__main__':
    main()