import math
N1 = int(input())
lsA = list(map(int,input().split()))
N2 = int(input())
lsB = list(map(int,input().split()))
lsc = lsA[0]*lsB[-1]
lsp = 1
for i in range(1,N1):
    lsp *= lsA[i]
for i in range(N2-2,-1,-1):
    lsp *= lsB[i]
gcd = math.gcd(lsc, lsp)
if lsc*lsp < 0:
    print(-abs(lsc//gcd),abs(lsp//gcd))
else:
    print(lsc//gcd,lsp//gcd)