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

int main()
{
    int A, B, C, D, E;
    cin >> A >> B >> C >> D >> E;
    int N = lcm(A + B, C + D);
    vector<int> r1(A + B);
    vector<int> r2(C + D);
    for (int i = 0; i < A; i++)
    {
        r1[i] = 1;
    }
    for (int i = 0; i < C; i++)
    {
        r2[i] = 1;
    }
    int T = 0;
    for (int i = 0; i < N; i++)
    {
        if (r1[i % (A + B)] && r2[i % (C + D)])
        {
            T++;
        }
    }
    int ans = 0;
    ans += T * (E / N);
    E -= (E / N) * N;
    for (int i = 0; i < E; i++)
    {
        if (r1[i % (A + B)] && r2[i % (C + D)])
        {
            ans++;
        }
    }
    cout << ans;
}