dtt

import java.util.Scanner;
class Add{
    Scanner scan =new Scanner(System.in);

    public static void main(String[] args){
        Scanner scan =new Scanner(System.in);
        String command =scan.nextLine();
        String input =scan.nextLine();
        switch (command){
            case "int":
                int number = Integer.parseInt(input);
               add(number);
                break;
            case "real":
                double num = Double.parseDouble(input);
                add (num);
                break;
            case "string":
                add (input);
                break;
        }



}

private static void add(int number){


                number*=2;
                System.out.println(number);


}
private static void add(double num){

    num*=1.50;
    System.out.printf("%.2f",num);

}
private static void add(String input){


        System.out.printf("$%s$",input);
}

}