import math
n=int(input())
a=list(map(int,input().split()))
m=int(input())
b=list(map(int,input().split()))
x,y=1,1
for i in range(1,len(a)):
    x*=a[i]
for j in range(1,len(b)):
    y*=b[j]
top=a[0]*y
bottom=b[0]*x
g=math.gcd(top,bottom)
top//=g;bottom//=g
if top>0 and bottom<0:
    top*=-1;bottom*=-1
print(str(top)+' '+str(bottom))