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

#define For(i, a, b) for(int i = (a); i < (b); i++)
#define rep(i, n) For(i, 0, n)
#define rFor(i, a, b) for(int i = (a); i >= (b); i--)
#define ALL(v) (v).begin(), (v).end()
#define rALL(v) (v).rbegin(), (v).rend()

using lint = long long;
using ld = long double;

int INF = 2000000000;
lint LINF = 1000000000000000000;

struct SetupIo {
    SetupIo() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
        cout << fixed << setprecision(15);
    }
} setupio;

int main() {
    vector<pair<lint, lint>> p(4);
    rep(i, 4) {
        cin >> p[i].second;
    }
    rep(i, 4) {
        cin >> p[i].first;
    }
    lint t;
    cin >> t;
    sort(ALL(p));
    lint ans = 0;
    for (auto [cost, num] : p) {
        lint cnt = min(num, t / cost);
        ans += cnt;
        t -= cost * cnt;
    }
    cout << ans << "\n";
}