#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int main() {
    ll a, b, c, d;
    cin >> a >> b >> c >> d;
    ll p, q, r, s, t;
    cin >> p >> q >> r >> s >> t;

    tuple<ll, ll> x[4] = {{p, a}, {q, b}, {r, c}, {s, d}};
    sort(x, x+4);

    ll ans = 0;
    for (int i = 0; i < 4; i++) {
        ans += min(t/get<0>(x[i]), get<1>(x[i]));
        t -= min(t/get<0>(x[i]), get<1>(x[i]))*get<0>(x[i]);
    }

    cout << ans << endl;

    return 0;
}