#include <iostream>
#include <algorithm>
#include <iomanip>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <cassert>
#include <cmath>

#define debug_value(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << #x << "=" << x << endl;
#define debug(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << x << endl;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

using namespace std;
typedef long long ll;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << setprecision(10) << fixed;
    ll a, b, c, d, e; cin >> a >> b >> c >> d >> e;
    ll s = a+b, t = c+d;
    int l = s*t;
    ll rem = e%l;
    ll ans = 0;
    for(int i = 0; i < l; i++){
        if(i%s < a && i%t < c){
            ans += e/l;
            if(i < rem) ans++;
        }
    }
    cout << ans << endl;
}