using System;

public class Program

{

    public static void Main()

    {

        // Input

        double test1 = 78;

        double test2 = 89;

        // Make program interactive - ask for final grade

        Console.Write("What is your final grade? ");

        string finalAsString = Console.ReadLine();

        double final = Convert.ToDouble(finalAsString);

        // Processing/ calculations

        double overallGrade = .3*test1 + .3*test2 + .4*final;

        //Output

        Console.WriteLine("Your overall grade is {0}", overallGrade.ToString("F3"));

    }

}