#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int a, b, c, d, e;
  cin >> a >> b >> c >> d >> e;
  int l = lcm(a + b, c + d);
  vector<int> tmp(l, 0);
  for (int t = 0; t < l; t++) {
    if (t % (a + b) < a) tmp[t]++;
    if (t % (c + d) < c) tmp[t]++;
  }
  int cnt = 0;
  for (int t = 0; t < l; t++)
    if (tmp[t] == 2) cnt++;
  int rem = 0;
  for (int t = 0; t < e % l; t++)
    if (tmp[t] == 2) rem++;
  cout << e / l * cnt + rem << endl;
  return 0;
}