#include<iostream>
#include<vector>

using namespace std;

int gcd(int,int);

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];
	}

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

	int y = gcd(bunsi,bunbo);

	bunsi /= y;
	bunbo /= y;

	cout << bunsi << " " << bunbo << endl;

	return 0;
}

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