#include <bits/stdc++.h>

#include <atcoder/all>
using namespace std;
using i32 = int;
using u32 = unsigned int;
using i64 = long long;
using u64 = unsigned long long;
#define FAST_IO                \
  ios::sync_with_stdio(false); \
  cin.tie(0);
const i64 INF = 1001001001001001001;
using Modint = atcoder::static_modint<998244353>;

int main() {
  FAST_IO
  auto ans = 0LL;

  vector<pair<i64, i64>> a(4);
  for (auto& [x, y] : a) cin >> x;
  for (auto& [x, y] : a) cin >> y;

  ranges::sort(a, [](auto& x, auto& y) { return x.second < y.second; });

  i64 T;
  cin >> T;

  for (int i = 0; i < 4; i ++) {
    i64 x = min(a[i].first, T / a[i].second);
    ans += x;
    T -= x * a[i].second;
  }

  cout << ans << endl;
}