import sys
from math import gcd

def input(): return sys.stdin.readline().strip()
def list2d(a, b, c): return [[c] * b for i in range(a)]
def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)]
def list4d(a, b, c, d, e): return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)]
def ceil(x, y=1): return int(-(-x // y))
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(N=None): return list(MAP()) if N is None else [INT() for i in range(N)]
def Yes(): print('Yes')
def No(): print('No')
def YES(): print('YES')
def NO(): print('NO')
sys.setrecursionlimit(10 ** 9)
INF = 10 ** 18
MOD = 10 ** 9 + 7
EPS = 10 ** -10

N = INT()
A = LIST()
M = INT()
B = LIST()

x = y = 1
x *= A[0]
for i in range(1, N):
    y *= A[i]

for i in range(M):
    if i % 2 == 1:
        x *= B[i]
    else:
        y *= B[i]

if (x < 0) ^ (y < 0):
    x = -abs(x)
    y = abs(y)
else:
    x = abs(x)
    y = abs(y)
g = gcd(abs(x), abs(y))
x //= g
y //= g
print(x, y)