using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var p = NList;
        var (a, b, c, d, e) = (p[0], p[1], p[2], p[3], p[4] - 1);
        var lcm = LCM(a + b, c + d);
        var dp = new int[lcm];
        for (var i = 0; i < dp.Length; ++i)
        {
            if (i > 0) dp[i] += dp[i - 1];
            if (i % (a + b) < a && i % (c + d) < c) ++dp[i];
        }
        WriteLine(e / lcm * dp[^1] + dp[e % lcm]);
    }
    static int LCM(int a, int b)
    {
        var gcd = GCD(a, b);
        return a / gcd * b;
    }
    static int GCD(int a, int b)
    {
        if (a < b) return GCD(b, a);
        if (a % b == 0) return b;
        return GCD(b, a % b);
    }
}