#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define llong long long

llong gcd(llong a, llong b) {
    if(a % b == 0) return b;
    return gcd(b, a % b);
}

int main() {
    int n1, n2;
    llong a = 1;
    llong b = 1;

    cin >> n1;
    rep(i, n1) {
        int val;
        cin >> val;
        if(i == 0) a *= val;
        else b *= val;
    }
    cin >> n2;
    rep(i, n2) {
        int val;
        cin >> val;
        if(i % 2 == 0) b *= val;
        else a *= val;
    }
    bool flg = a / abs(a) * b < 0;
    a = abs(a);
    b = abs(b);
    llong gcdval = gcd(max(a, b), min(a, b));
    if(flg) a *= -1;
    cout << a / gcdval << " " << b / gcdval << "\n";
}