import math

alen = int(input())
A = list(map(int,input().split()))
blen = int(input())
B = list(map(int,input().split()))

C = []
P = []
sig = 1
for i in range(alen):
    if i==0:
        C.append(A[i])
    else:
        P.append(A[i])
    sig*=A[i]
for i in range(blen):
    if i%2==1:
        C.append(B[i])
    else:
        P.append(B[i])
    sig*=B[i]
sig = sig//abs(sig)
c = 1
p = 1
for i in C:
    c *= i
for i in P:
    p *= i
gcd = math.gcd(abs(c),abs(p))
print(sig*abs(c)//gcd,abs(p)//gcd)