//#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define vin(vec, n) rep (i, n) cin >> vec[i];
using ll = long long;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using vc = vector<char>;
using vvc = vector<vector<char>>;
using pii = pair<int, int>;
const ll MOD = 998244353, MOD2 = 1000000007;
/************************************************************************************/
//何を問われているか - 

int main() {
  vector<pii> vec(4); //{一問当たりの時間、問題数}
  rep (i, 4) {
    cin >> vec[i].second;
  }
  rep (i, 4) {
    cin >> vec[i].first;
  }
  ll T; cin >> T;

  sort(all(vec));
  ll ans = 0;
  for (auto [t, num] : vec) {
    if (t * num >= T) {
      ans += T / t;
      break;
    }
    ans += num;
    T -= t * num;
  }
  cout << ans << '\n';
}