#include <iostream>
using namespace std;

long gcd(long x, long y) {
	return y ? gcd(y, x % y) : abs(x);
}

int main() {
	int n;
	long A, B = 1, tmp;
	cin >> n >> A;
	for (int i = 1; i < n; ++i) {
		cin >> tmp;
		B *= tmp;
	}
	cin >> n;
	for (int i = 0; i < n; ++i) {
		cin >> tmp;
		if (i % 2) A *= tmp;
		else B *= tmp;
	}
	if (B < 0) {
		A = -A;
		B = -B;
	}
	tmp = gcd(A, B);
	cout << A / tmp << " " << B / tmp;
}