#include <bits/stdc++.h>
#include <atcoder/all>
#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
namespace mp = boost::multiprecision;
using Bint = mp::cpp_int;
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    vector<P> a(4);
    rep(i,4) cin >> a[i].second;
    rep(i,4) cin >> a[i].first;
    sort(a.begin(),a.end());
    ll t;
    cin >> t;
    ll ans = 0;
    rep(i,4) {
        ll cnt = t/a[i].first;
        cnt = min(cnt, a[i].second);
        ans += cnt;
        t -= cnt*a[i].first;
    }
    cout << ans << endl;
    return 0;
}