#include <algorithm>
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(), (x).end()
#define ll long long
#define INF 1000000000000000000
typedef pair<ll, ll> pll;

long long GCD(long long a, long long b) {
    if (b == 0)
        return a;
    else
        return GCD(b, a % b);
}

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

    ll upp_bunshi = 0, upp_bunbo = 1;
    ll low_bunshi = 0, low_bunbo = 1;

    int n1;
    cin >> n1;
    rep(i, n1) {
        ll a;
        cin >> a;
        if (i == 0) {
            upp_bunshi = a;
        } else
            upp_bunbo *= a;
    }

    int n2;
    cin >> n2;
    rep(i, n2) {
        ll a;
        cin >> a;
        if (i == 0) {
            low_bunshi = a;
        } else
            low_bunbo *= a;
    }

    ll ans_bunshi = upp_bunshi * low_bunbo, ans_bunbo = upp_bunbo * low_bunshi;
    ll gcd = GCD(abs(ans_bunbo), abs(ans_bunshi));
    ans_bunbo /= gcd, ans_bunshi /= gcd;
    if (ans_bunbo < 0 || ans_bunshi < 0) {
        ans_bunshi = -abs(ans_bunshi);
        ans_bunbo = abs(ans_bunbo);
    }
    cout << ans_bunshi << " " << ans_bunbo << endl;
}