#include <bits/stdc++.h>
using namespace std;

int main() {
    int A,B,C,D,E;
    cin >> A >> B >> C >> D >> E;
    int N = (A+B)*(C+D);
    vector<int>tmp(N);
    for(int i = 0; i < N; i++) {
        int x = i%(A+B);
        int y = i%(C+D);
        if(x < A && y < C) {
            tmp[i] = 1;
        }
    }
    vector<int>sum(N+1);
    for(int i = 0; i < N; i++) {
        sum[i+1] = sum[i]+tmp[i];
    }
    cout << E/N*sum[N]+sum[E%N] << endl;
}