n_1=int(input())
A=list(map(int,input().split()))
n_2=int(input())
B=list(map(int,input().split()))
up,down=A[0],1
A=A[1:]
import math
for i in A:
    down*=i
for i,j in enumerate(B):
    if i%2==0:
        down*=j
    else:
        up*=j
minus=0
if down<0:minus+=1;down=abs(down)
if up<0:minus+=1;up=abs(up)
s=-1 if minus%2==1 else 1
print(s*up//math.gcd(up,down),down//math.gcd(up,down))