n1=int(input())
a=list(map(int,input().split()))
n2=int(input())
b=list(map(int,input().split()))

up=1
down=1

def gcd(a, b):
    if(a%b==0):
        return b
    else:
        return gcd(b, a%b)

for i in range(n1):
    if i==0:
        up*=a[i]
    else:
        down*=a[i]

for i in range(n2):
    if i%2==0:
        down*=b[i]
    else:
        up*=b[i]

if up<0 and down<0:
    up=-up
    down=-down

d=gcd(up,down)
up//=d
down//=d

print(str(up)+" "+str(down))