#yuki751

from operator import mul
from fractions import Fraction as f

n1=int(raw_input())
a=map(int,raw_input().split())
n2=int(raw_input())
b=map(int,raw_input().split())
nu=[a[0]]+b[1::2]
de=a[1:]+b[0::2]
nu=reduce(mul,nu)
de=reduce(mul,de)
res=f(nu,de)
print res.numerator,res.denominator