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

using ll=long long;
#include<atcoder/modint>
using namespace atcoder;
using mint=modint998244353;


int main(){
	
	cin.tie(nullptr);
	ios::sync_with_stdio(false);

	ll A[4],P[4];
	for(int i=0;i<4;i++)cin>>A[i];
	for(int i=0;i<4;i++)cin>>P[i];
	ll T;
	cin>>T;
	ll S=0;
	ll an=0;
	for(int i=0;i<4;i++){
		ll D=min(A[i],(T-S)/P[i]);
		an+=D;
		S+=P[i]*D;
	}
	cout<<an<<endl;
}