#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main()
{
  vector<pair<long long,long long>>problem(4);
  long long t;
  for(int i=0;i<4;i++)cin >> problem[i].second;
  for(int i=0;i<4;i++)cin >> problem[i].first;
  cin >> t;
  sort(problem.begin(),problem.end());
  long long ans=0;
  for(int i=0;i<4;i++){
    if(t/problem[i].first>=problem[i].second){
      ans+=problem[i].second;
      t-=problem[i].first*problem[i].second;
    }
    else{
      ans+=t/problem[i].first;
      break;
    }
  }
  cout << ans << endl;
}