#include <bits/stdc++.h>
using namespace std;
long long gcd (long long a, long long b) {
  if (a < b) {
    swap(a, b);
  }
  if (b == 0) {
    return 0;
  }
  while (b) {
    a %= b;
    swap(a, b);
  }
  if (a < 0) {
    a *= -1;
  }
  return a;
}
pair<long long, long long> reduce (pair<long long, long long> a, pair<long long, long long> b) {
  long long num = a.first * b.second;
  long long den = a.second * b.first;
  long long g = gcd(num, den);
  num /= g;
  den /= g;
  if (den < 0) {
    num *= -1;
    den *= -1;
  }
  return {num, den};
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int m;
  cin >> m;
  vector<int> a(m);
  for (int i = 0; i < m; i++) {
    int tmp;
    cin >> tmp;
    a[i] = tmp;
  }
  pair<long long, long long> frc;
  if (m ==1) {
    frc = {a[0], 1};
  } else {
    frc = {a[0], a[1]};
  }
  for (long long i = 2; i < m; i++) {
    frc = reduce(frc, {a[i], 1});
  }
  int n;
  cin >> n;
  vector<int> b(n);
  for (int i = 0; i < n; i++) {
    int tmp;
    cin >> tmp;
    b[i] = tmp;
  }
  pair<long long, long long> grc;
  if (n == 1) {
    grc = {b[n - 1], 1};
  } else {
    grc = {b[n - 2], b[n - 1]};
  }
  for (int i = n - 3; i >= 0; i--) {
    grc = reduce({b[i], 1}, grc);
  }
  pair<long long, long long> ans = reduce(frc, grc);
  cout << ans.first << ' ' << ans.second << '\n';
  return 0;
}