#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)(s); i < (int)(e); ++i)
#define all(a) (a).begin(),(a).end()

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    
    vector<pair<ll, ll>> P(4);
    rep(i, 0, 4) cin >> P[i].second;
    rep(i, 0, 4) cin >> P[i].first;
    ll T;
    cin >> T;
    
    sort(all(P));
    
    ll ans = 0;
    rep(i, 0, 4) {
        ll t = min(P[i].second, T / P[i].first);
        ans += t;
        T -= t * P[i].first;
    }
    cout << ans << '\n';
}