#include "bits/stdc++.h"

using namespace std;
using ll = long long;
const double pi = acos(-1);
#define FOR(i,a,b) for (ll i=(a),__last_##i=(b);i<__last_##i;i++)
#define RFOR(i,a,b) for (ll i=(b)-1,__last_##i=(a);i>=__last_##i;i--)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) RFOR(i,0,n)
#define __GET_MACRO3(_1, _2, _3, NAME, ...) NAME
#define rep(...) __GET_MACRO3(__VA_ARGS__, FOR, REP)(__VA_ARGS__)
#define rrep(...) __GET_MACRO3(__VA_ARGS__, RFOR, RREP)(__VA_ARGS__)
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v) {
	REP(i, v.size()) { if (i)os << " "; os << v[i]; }return os;
}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v) {
	REP(i, v.size()) { if (i)os << endl; os << v[i]; }return os;
}

const ll INF = LLONG_MAX;
ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

#define int long long

inline void my_io() {

	std::ios::sync_with_stdio(false);

	std::cin.tie(0);

	cout << fixed << setprecision(16);

	//cout << setprecision(10) << scientific << ans << endl;
}

//最大公約数
ll gcd(ll m, ll n)
{
	if (m < n) {
		swap(m, n);
	}

	if (n == 0) {
		return m;
	}

	return gcd(n, m % n);
}

signed main() {
	ll na, nb;

	cin >> na;

	vector<ll> a(na);

	ll ca = 0;

	REP(i, na) {
		cin >> a[i];
		if (a[i] < 0) {
			ca++;
			a[i] = -a[i];
		}
	}

	cin >> nb;

	vector<ll> b(nb);

	ll cb = 0;

	REP(i, nb) {
		cin >> b[i];
		if (b[i] < 0) {
			cb++;
			b[i] = -b[i];
		}
	}

	ll pa = a[0];
	ll qa = 1;

	FOR(i, 1, na) {
		qa = qa * a[i];
		ll x = gcd(pa, qa);
		pa = pa / x;
		qa = qa / x;
	}

	ll pb = b[nb - 1];
	ll qb = 1;

	RREP(i, nb - 1) {
		swap(pb, qb);
		pb = pb * b[i];
		ll x = gcd(pb, qb);
		pb = pb / x;
		qb = qb / x;
	}

	ll p = pa * qb;
	ll q = qa * pb;

	ll x = gcd(p, q);

	p = p / x;
	q = q / x;

	if (ca % 2 != cb % 2) {
		p = -p;
	}

	cout << p << " " << q << endl;
}