defmodule Frac do
  defstruct nume: 0, deno: 1

  def new(nume, deno) do
    if deno == 0, do: raise "ZeroDivision error"
    if deno < 0 do
      new(-nume, -deno)
    else
      %__MODULE__{nume: nume, deno: deno}
    end
  end

  def is_less_or_equal(a, b) do
    na = a.nume * b.deno
    nb = b.nume * a.deno
    na <= nb
  end
end

defmodule Main do
  def input, do: IO.read(:line) |> String.trim
  def ii, do: input() |> String.to_integer
  def li, do: input() |> String.split |> Enum.map(&String.to_integer/1)
  def yn(b), do: IO.puts(if b, do: "Yes", else: "No")

  def main do
    _n = ii()
    a = li()
    m = ii()
    b = li()

    nume = hd(a) * (2..m//2 |> Enum.map(fn p -> Enum.at(b, p-1) end) |> Enum.product)
    deno = Enum.product(tl(a)) * (1..m//2 |> Enum.map(fn p -> Enum.at(b, p-1) end) |> Enum.product)

    # IO.inspect {:nume, nume, :deno, deno}
    g = Integer.gcd(nume, deno)
    nume = div(nume, g)
    deno = div(deno, g)
    IO.puts "#{nume} #{deno}"
  end
end