INF = 10 ** 9
MOD = 10 **9 + 7
import sys
sys.setrecursionlimit(100000000)
dy = (-1,0,1,0)
dx = (0,1,0,-1)
from math import gcd

def main():
    n = int(input())
    a = list(map(int,input().split()))
    m = int(input())
    b = list(map(int,input().split()))
  
    child = a[0]
    mother = 1
    for i in range(1,n):
        mother *= a[i]
    for i in range(m):
        if i%2 == 0:
            mother *= b[i]
        else:
            child *= b[i]
    if child < 0 and mother < 0:
        child *= -1
        mother *= -1
    elif child > 0 and mother < 0:
        child *= -1
        mother *= -1
    g = gcd(child,mother)
    print(child//g,mother//g)

if __name__=='__main__':
    main()