#include <iostream>
#include <algorithm>
#include <vector>
#include <array>
using namespace std;
typedef long long ll;
int main()
{
  vector<array<ll, 2>> v(4);
  for (int i = 0; i < 4; i++)
  {
    cin >> v[i][1];
  }
  for (int i = 0; i < 4; i++)
  {
    cin >> v[i][0];
  }
  ll T;
  cin >> T;
  ll ans = 0;
  ranges::sort(v);
  for (int i = 0; i < 4; i++)
  {
    ans += min(v[i][1], T / v[i][0]);
    T -= min(v[i][1], T / v[i][0]) * v[i][0];
  }
  cout << ans << '\n';
  return 0;
}
/*
  File : ~/yukicoder/530/B.cpp
  Date : 2025/03/21
  Time : 21:21:54
*/