#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); ++i)

using namespace std;
using ll = long long;
using P = pair<ll, ll>;

int main() {
    int n = 4;
    vector<P> ps(n);
    rep(i, n) cin >> ps[i].second;
    rep(i, n) cin >> ps[i].first;
    
    sort(ps.begin(), ps.end());
    
    ll T;
    cin >> T;
    
    ll ans = 0;
    for (auto [t, num] : ps) {
        ll x = min(T/t, num);
        ans += x;
        T -= x*t;
    }
    
    cout << ans << '\n';
    
    return 0;
}