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

int main()
{
    vector<pair<unsigned long long, unsigned 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;
    }
    sort(P.begin(), P.end());
    unsigned long long T;
    cin >> T;
    unsigned long long ans = 0;
    for (int i = 0; i < 4; i++)
    {
        unsigned long long count = min(P[i].second, T / P[i].first);
        T -= count * P[i].first;
        ans += count;
    }
    cout << ans;
}