#include<iostream>
#include<vector>

using namespace std;

typedef long long ll;

ll gcd(ll,ll);

int main() {

	int n, m;
	vector<int> a, b;

	cin >> n;
	for (int i = 0;i < n;++i) {
		int buff;
		cin >> buff;
		a.push_back(buff);
	}

	cin >> m;
	for (int i = 0;i < m;++i) {
		int buff;
		cin >> buff;
		b.push_back(buff);
	}

	int c = 1;
	for (int i = 1;i < a.size();++i) {
		c *= a[i];
	}
	int d = 1;
	for (int i = 1;i < b.size();++i) {
		d *= b[i];
	}

	ll bunsi = d * a[0];
	ll bunbo = c * b[0];

	if (bunbo < 0) {
		bunsi = -bunsi;
		bunbo = -bunbo;
	}
	ll y = gcd(bunsi, bunbo);

	cout << bunsi/y << " " << bunbo/y << endl;

	return 0;
}

ll gcd(ll a, ll b) {
	if (a < b) gcd(b, a);
	ll r;
	while ((r = a % b)) {
		a = b;
		b = r;
	}
	return b;
}