using System;

public class Program

{

    public static void Main()

    {

        double bookPrice,booknumber,sum,dollar_price;

        Console.WriteLine("enter the price of the book");

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

        Console.WriteLine("enter the number of the book");

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

        sum=bookPrice*booknumber;

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

        Console.WriteLine("enter dollar_price");

        dollar_price=sum/3.45;

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

    }

}