#include <iostream>
#include <string>
#include <algorithm>
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
bool bo[1000010] = { false };
int main() {
	int a, b, c, d, e;
	cin >> a >> b >> c >> d >> e;
	int co = 0;
	for (int i = 0; i < (a + b) * (c + d); i++) {
		if (i % (a + b) < a && i % (c + d) < c) {
			bo[i] = true;
			co++;
		}
	}
	int ans = co * (e / ((a + b) * (c + d)));
	for (int i = 0; i < e % ((a + b) * (c + d)); i++) {
		if (bo[i]) {
			ans++;
		}
	}
	cout << ans << endl;
}