n_a = gets.to_i
A = gets.split.map(&:to_i)
n_b = gets.to_i
B = gets.split.map(&:to_i)
A << 1
B << 1

def dfs(i, r, nums)
  if i + 1 < nums.size
    dfs(i + 1, Rational(r, nums[i]), nums)
  else
    Rational(r, nums[i])
  end
end

def dfs_r(i, r, nums)
  if i > 0
    dfs_r(i - 1, Rational(nums[i], r), nums)
  else
    Rational(nums[i], r)
  end
end

r = Rational(dfs(1, A[0], A), dfs_r(n_b, B[-1], B))
puts [r.numerator, r.denominator].join(' ')