using System;

public class Program

{ 

    public static void Main()

    {   string muzar;

        double mhir=0;

        Console.WriteLine("Enter name of  product");

        muzar=Console.ReadLine();

     if (muzar== "milk")

     {

         Console.WriteLine("price 3$");

         mhir=3;

     }

     if (muzar== "water")

     {

         Console.WriteLine("price 1.3$");

         mhir=1.3;

     }

      if (muzar== "bread")

     {

         Console.WriteLine("price 2.3$");

         mhir=2.3;

     }

     if(mhir==0)Console.WriteLine("product not exist");

      Console.WriteLine("value added tax"+ "="+ mhir*0.18+"$");

    }

}