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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    vector<pair<long long, long long>> P(4);
    for (int i = 0; i < 4; i++) cin >> P[i].second;
    for (int i = 0; i < 4; i++) cin >> P[i].first;
    long long T;
    cin >> T;
    sort(P.begin(), P.end());
    long long ans = 0;
    for (auto [t, c] : P) {
        auto s = min(c, T / t);
        T -= t * s;
        ans += s;
    }
    cout << ans << endl;
}