#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
//using mint = modint1000000007;
//using mint = modint998244353;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, a, b) for (int i = a; i < (int)(b); i++)
#define rrep(i, a, b) for (int i = a; i > (int)(b); i--)
#define all(v) v.begin(), v.end()
using ll = long long;
const ll INF = 1e18;
// 変数定義
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int A, B, C, D, E;
	cin >> A >> B >> C >> D >> E;
	int cyc = (A + B) * (C + D);
	int cnt = 0;
	int cnt2 = 0;
	rep(i, cyc) {
		if (i % (A + B) < A && i % (C + D) < C) cnt++;
		if (i + 1 == E % cyc) cnt2 = cnt;
	}
	cout << (int)E/cyc * cnt + cnt2 << '\n';
	return 0;
}