#include <bits/stdc++.h>
#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
#include<string>
using ll = long long;
using namespace std;

int main()
{
    ll a, b, c, d, e, lcm, cnt1 = 0, cnt2 = 0, coin = 0, ans, r;
    cin >> a >> b >> c >> d >> e;
    bool x = true, y = true;
    lcm = (a+b)*(c+d)/gcd(a+b, c+d);
    for (int i = 0; i < lcm; i++){
        cnt1++;
        cnt2++;
        if (x && y) coin++;
        if (x && cnt1 == a){
            x = false;
            cnt1 = 0;
        } else if (!x && cnt1 == b){
            x = true;
            cnt1 = 0;
        }
        if (y && cnt2 == c){
            y = false;
            cnt2 = 0;
        } else if (!y && cnt2 == d){
            y = true;
            cnt2 = 0;
        }
    }
    coin *= e/lcm;
    r = e%lcm;
    for (int i = 0; i < r; i++){
        cnt1++;
        cnt2++;
        if (x && y) coin++;
        if (x && cnt1 == a){
            x = false;
            cnt1 = 0;
        } else if (!x && cnt1 == b){
            x = true;
            cnt1 = 0;
        }
        if (y && cnt2 == c){
            y = false;
            cnt2 = 0;
        } else if (!y && cnt2 == d){
            y = true;
            cnt2 = 0;
        }
    }
    cout << coin << endl;   
}