#include <iostream>
#include <iomanip>
#include <cstdio>
#include <queue>
#include <cstring>
#include <vector>
#include <map>
#include <algorithm>
#include <cctype>
#include <cmath>
#include <bitset>
#include <set>
#include <deque>
#include <stack>
#include <atcoder/all>
using namespace std;
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define rrep(i,n) for(int i = 1; i <= (n); ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
#define srep(i,s,t) for (int i = s; i < (t); ++i)
#define dsrep(i,t,s) for(int i = (t)-1; i >= (s); --i)
#define rng(a) a.begin(),a.end()
#define rrng(a) a.rbegin(),a.rend()
#define isin(x,l,r) ((l) <= (x) && (x) < (r))
int dx4[4]={1,0,-1,0};
int dy4[4]={0,-1,0,1};
using ll = long long;
using uint = unsigned;
using ull = unsigned long long;
using P = pair<int,int>;
const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;
// const ll mod = 998244353;
const ll mod = 1e9 + 7;

////////////////////////////////////////////
int a, b, c, d, e;

int gcd(int a, int b) {
  if(b == 0) return a;
  return gcd(b, a % b);
}

int lcm(int a, int b) {
  if(a < b) swap(a, b);
  return a * b / gcd(a, b);
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

  cin >> a >> b >> c >> d >> e;
  int ab = a + b, cd = c + d;
  int lc = lcm(ab, cd);

  int ans = 0;
  rep(i, lc) if(i % ab < a && i % cd < c) ans++;
  ans *= (e / lc);

  rep(i, e % lc) if(i % ab < a && i % cd < c) ans++;

  cout << ans << endl;
}