/* -*- coding: utf-8 -*-
 *
 * 3065.cc:  No.3065 Speedrun (Normal) - yukicoder
 */

#include<cstdio>
#include<algorithm>
#include<utility>

using namespace std;

/* constant */

const int M = 4;

/* typedef */

using ll = long long;
using pii = pair<int,int>;

/* global variables */

int as[M], ps[M];
pii pas[M];

/* subroutines */

/* main */

int main() {
  for (int i = 0; i < M; i++) scanf("%d", as + i);
  for (int i = 0; i < M; i++) scanf("%d", ps + i);
  ll t;
  scanf("%lld", &t);

  for (int i = 0; i < M; i++) pas[i] = {ps[i], as[i]};
  sort(pas, pas + M);

  ll sum = 0;
  for (int i = 0; i < M; i++) {
    auto [pi, ai] = pas[i];
    ll d = min(t / pi, (ll)ai);
    sum += d;
    t -= d * pi;
  }

  printf("%lld\n", sum);
  
  return 0;
}