#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll,ll> P;
#define REP(i,n) for(ll i=0;i<ll(n);i++)










int main(void){
	cin.tie(nullptr);  ios_base::sync_with_stdio(false);
	ll i,j;





	ll a,b,c,d;
	cin >> a >> b >> c >> d;
	ll p,q,r,s,T;
	cin >> p >> q >> r >> s >> T;


	vector<P> v;
	v.push_back(P(p,a));
	v.push_back(P(q,b));
	v.push_back(P(r,c));
	v.push_back(P(s,d));

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


	ll ans=0;
	REP(i,4){
		ll a=v[i].first,b=v[i].second;

		if(T>=a*b){
			ans+=b;
			T-=a*b;
		}else{
			cout << ans+T/a << endl;
			return 0;
		}
	}





	cout << ans << endl;









	return 0;
}