using System.Linq;
using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var a = Array.ConvertAll(line, long.Parse);
        line = Console.ReadLine().Trim().Split(' ');
        var b = Array.ConvertAll(line, long.Parse);
        getAns(a, b);
    }
    static void getAns(long[] a, long[] b)
    {
        var c = new (long x, long y)[4];
        for (int i = 0; i < 4; i++) c[i] = (a[i], b[i]);
        var tt = 0L;
        var ans = 0L;
        foreach (var z in c.OrderBy(z => z.y))
        {
            var w = z.x * z.y;
            if (tt + w <= b[4]) { tt += w; ans += z.x; }
            else
            {
                var ww = (b[4] - tt) / z.y;
                ans += ww;
                Console.WriteLine(ans);
                return;
            }
        }
        Console.WriteLine(ans);
    }
}