01.Distance

using System;

namespace _01.Distance
{
    class Program
    {
        static void Main(string[] args)
        {
            double startSpeed = double.Parse(Console.ReadLine());
            double time1 = double.Parse(Console.ReadLine());
            double time2 = double.Parse(Console.ReadLine());
            double time3 = double.Parse(Console.ReadLine());

            double distanceOneHour = startSpeed * time1 / 60;

            double distanceTenPercent = 10 * startSpeed / 100;

            double distance2Km = (distanceTenPercent + startSpeed);

            double d2 = time2 / 60;
            double distance2Hour = distance2Km * d2;

            double distanceFivePercent = distance2Km - (5 * distance2Km / 100);

            double d3 = time3 / 60;
            double distanceFiveResult = distanceFivePercent * d3;

            double result = distanceOneHour + distance2Hour + distanceFiveResult;

            Console.WriteLine($"{result:f2}");
        }
    }
}