import java.util.Scanner;

/** 
   This program reads information about coins and 
   prints the value of the coins.
*/
public class Coins
{
   public static void main(String[] args)
   {
      // Define constants
      final String P_TYPE = "P";
      final String N_TYPE = "N";
      final String D_TYPE = "D";
      final String Q_TYPE = "Q";

      // Read a number and type of coin 
      System.out.println("Enter number and type of coins: ");

      Scanner in = new Scanner(System.in);
      int numCoins = in.nextInt();
      String typCoin = in.next();

      // Determine and print worth of coin pile

      // Use output statements
      double value;
      switch(typCoin)
      {
         case "P":
            value = 0.01d * numCoins;
            break;
         case "N":
            value = 0.05d * numCoins;
            break;
         case "D":
            value = 0.10d * numCoins;
            break;
         case "Q":
            value = 0.25d * numCoins;
            break;
         default:
            System.out.println("Error");
            return;
      }
      
      System.out.printf("%.2f\n", value);
   }
}