using System;

public class Program

{

    public static void Main()

    {

         /*//1

  int A = int.Parse(Console.ReadLine());

  int B=int.Parse(Console.ReadLine());

  int C=int.Parse(Console.ReadLine());

  int D=int.Parse(Console.ReadLine());

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

  double pB = pA + pA * 0.7;

  double pC = pB + pB * 0.5;

  double pD = pC + pC * 0.4;

  double totalPrice=A*pA+B*pB+C*pC+D*pD;

  Console.WriteLine(totalPrice);*/

​

/* //2

 int A = int.Parse(Console.ReadLine());

 int B = int.Parse(Console.ReadLine());

 int C = int.Parse(Console.ReadLine());

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

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

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

 double AX = A * X;

 double BY = B * Y;

 double CZ = C * Z;

 double totalPrice = AX + BY + CZ;

 Console.WriteLine($"{totalPrice:f2}");*/

​

 //4

 double carP=int.Parse(Console.ReadLine());

 double years=int.Parse(Console.ReadLine());

 int percentYear=int.Parse(Console.ReadLine());

 double value=carP;

​

 for (int i = 0; i < years; i++)

 {

     value -= value* (percentYear / 100.0);

 }

 Console.WriteLine(value);

    }

}