#pragma GCC optimize("O3")
//#pragma GCC target("avx2")
//#pragma GCC optimize("unroll-loops")

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ld> vld;
typedef pair<ll,ll> Pll;
typedef pair<int,int> Pin;

ll INF = 1e16;
int inf = 1e9;

#define ALL(x) (x).begin(), (x).end()
#define FOR(i, m, n) for (ll i = (m); i < (n); ++i)
#define REVFOR(i, m, n) for (ll i = (n - 1); i >= (m); --i)
#define REP(i, n) FOR(i, 0, n)
#define REVREP(i, n) REVFOR(i, 0, n)
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define bcnt __builtin_popcountll

#ifdef LOCAL
#include <prettyprint.hpp>
#define debug(...)  cerr << "[" << #__VA_ARGS__ << "]: ", d_err(__VA_ARGS__);
#else
#define debug(...) 83;
#endif

void d_err() {
    cerr << endl;
}

template <typename H, typename... T>
void d_err(H h, T... t) {
    cerr << h << " ";
    d_err(t...);
}

template <typename T>
void print(T x) {
    cout << x << "\n";
}

template <typename T>
void print(vector<T>& x) {
    int N = x.size();
    REP(i, N) {
        if (i > 0) cout << " ";
        cout << x[i];
    }
    cout << "\n";
}

int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(false);
    cout << fixed << setprecision(20);

    int a, b, c, d; cin >> a >> b >> c >> d;
    ll t; cin >> t;

    int u1 = (a + b), u2 = (c + d);
    int lcm =  u1 * u2  / __gcd(u1, u2);

    vll v1(lcm), v2(lcm);

    REP(i, lcm / u1) {
        REP(j, a) {
            v1[u1 * i + j] = 1;
        }
        REP(j, b) {
            v1[u1 * i + a + j] = 0;
        }
    }

    REP(i, lcm / u2) {
        REP(j, c) {
            v2[u2 * i + j] = 1;
        }
        REP(j, d) {
            v2[u2 * i + c + j] = 0;
        }
    }

    if (lcm >= t) {
        ll ans = 0;
        REP(i, t) ans += v1[i] * v2[i] == 1;
        print(ans);
    } else {
        ll l = t / lcm;
        ll ans = 0;
        REP(i, lcm) ans += v1[i] * v2[i] == 1;
        ans *= l;

        REP(i, t - lcm * l) ans += v1[i] * v2[i] == 1;
        print(ans);
    }
}