using System;

public class Program

{

    public static void Main()

    {

           double rate,tfcg,tscg,ttcg;

        Console.WriteLine("enter the tfcg");

        tfcg = double.Parse(Console.ReadLine());

        Console.WriteLine("enter the tscg");

        tscg = double.Parse(Console.ReadLine());

        Console.WriteLine("enter the ttcg");

        ttcg = double.Parse(Console.ReadLine());

        rate = (tfcg * 40 / 100) + (tscg * 20 / 100) + (ttcg * 40 / 100);

        Console.WriteLine(rate);

​

​

​

​

    }

}