#include "bits/stdc++.h"

using namespace std;
using ll = long long;

void Main() {
    ll A, B, C, D, E;
    cin >> A >> B >> C >> D >> E;

    ll period = (A + B) * (C + D) / __gcd(A + B, C + D);
    ll nPeriod = E / period;
    ll residual = E % period;

    ll ans = 0LL;
    for (ll i = 1; i <= period; ++i) {
        ll robot1 = i % (A + B);
        ll robot2 = i % (C + D);
        if (0 < robot1 && robot1 <= A && 0 < robot2 && robot2 <= C) {
            ++ans;
        }
    }
    ans *= nPeriod;
    for (ll i = 1; i <= residual; ++i) {
        ll robot1 = i % (A + B);
        ll robot2 = i % (C + D);
        if (0 < robot1 && robot1 <= A && 0 < robot2 && robot2 <= C) {
            ++ans;
        }
    }
    cout << ans << endl;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    std::cout << std::fixed << std::setprecision(15);
    Main();
    return 0;
}