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

#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#define int long long

signed main(){
	vector<pair<int,int>> v(4);
	for(int i=0;i<4;i++)cin>>v[i].second;
	for(int i=0;i<4;i++)cin>>v[i].first;
	int T;cin>>T;

	sort(v.begin(),v.end());

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