#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef unsigned long long ull;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll myRand(ll B) {
    return (ull)rng() % B;
}

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int a,b,c,d; cin >> a >> b >> c >> d;
    int e; cin >> e;
    auto cal=[&](int n)->int{
        int cnt=0;
        for(int i=0;i<n;i++){
            if(i%(a+b)<a and i%(c+d)<c)cnt++;
        }
        return cnt;
    };
    ll x=a+b,y=c+d;
    int res=e/(x*y)*cal(x*y)+cal(e%(x*y));
    cout << res << endl;
}