#include "bits/stdc++.h"

using namespace std;

using ll = long long;
using ld = long double;

const double PI = 3.1415926535897932384626433832795;

const int dx[] = { 0, 1, 0, -1 };
const int dy[] = { -1, 0, 1, 0 };

int gcd(int x, int y) { return y ? gcd(y, x % y) : x; }
ll gcd(ll x, ll y) { return y ? gcd(y, x % y) : x; }
int lcm(int x, int y) { return x / gcd(x, y) * y; }
ll lcm(ll x, ll y) { return x / gcd(x, y) * y; }

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	ll n1;
	cin >> n1;
	vector<ll> a(n1);
	for (auto &v : a) {
		cin >> v;
	}

	ll n2;
	cin >> n2;
	vector<ll> b(n2);
	for (auto &v : b) {
		cin >> v;
	}

	ll numer = a[0], denom = 1;
	for (int i = 1; i < n1; i++) {
		denom *= a[i];
	}

	denom *= b[0];
	for (int i = 1; i < n2; i++) {
		numer *= b[i];
	}

	if (denom < 0) {
		numer *= -1;
		denom *= -1;
	}

	ll g = gcd(numer, denom);
	numer /= g;
	denom /= g;

	cout << numer << " " << denom << endl;
	return 0;
}