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

int main()
{
    vector<pair<int, int>> x;
    long long a, b, c, d;
    cin >> a >> b >> c >> d;
    long long p, q, r, s, t;
    cin >> p >> q >> r >> s >> t;
    x.push_back({p, a});
    x.push_back({q, b});
    x.push_back({r, c});
    x.push_back({s, d});
    sort(x.begin(), x.end());
    long long cnt = 0;
    for (int i = 0; i < 4; i++)
    {
        if (x[i].first * x[i].second <= t)
        {
            cnt += x[i].second;
            t -= (x[i].first * x[i].second);
        }
        else
        {
            cnt += (t / x[i].first);
            break;
        }
    }
    cout << cnt << endl;
}