using System;

public class Program

{

    public static void Main()

    {

     double Chapter1,Chapter2,Chapter3,CalculatesTheFirstSemesterMark,TheMarkForTheSecondSemesterIsCalculated,TheScoreForTheThirdSemesterIsCalculated;

     Console.WriteLine("ادخل قيمة  Chapter1");

     Chapter1 =double.Parse(Console.ReadLine());

     Console.WriteLine("  Chapter2 ادخل قيمة ");    

     Chapter2 =double.Parse(Console.ReadLine());

     Console.WriteLine("  Chapter3 ادخل قيمة ");    

     Chapter3 =double.Parse(Console.ReadLine());

     CalculatesTheFirstSemesterMark=Chapter1/40;

     Console.WriteLine("the CalculatesTheFirstSemesterMark is{0}",CalculatesTheFirstSemesterMark );

     TheMarkForTheSecondSemesterIsCalculated=Chapter2/20;

     Console.WriteLine("the TheMarkForTheSecondSemesterIsCalculated is{0}",TheMarkForTheSecondSemesterIsCalculated ); 

     TheScoreForTheThirdSemesterIsCalculated =Chapter3/40;

     Console.WriteLine("the TheScoreForTheThirdSemesterIsCalculated is{0}",TheScoreForTheThirdSemesterIsCalculated  );                                                      

    }

}