#include <bits/stdc++.h>
using namespace std;
int main(){
  vector<int> A(4);
  for (int i = 0; i < 4; i++){
    cin >> A[i];
  }
  vector<int> B(4);
  for (int i = 0; i < 4; i++){
    cin >> B[i];
  }
  long long T;
  cin >> T;
  vector<pair<int, int>> C(4);
  for (int i = 0; i < 4; i++){
    C[i] = make_pair(B[i], A[i]);
  }
  sort(C.begin(), C.end());
  long long ans = 0;
  for (int i = 0; i < 4; i++){
    long long c = min((long long) C[i].second, T / C[i].first);
    ans += c;
    T -= c * C[i].first;
  }
  cout << ans << endl;
}