import java.io.PrintStream;

public class Revolution
{
   public static void main(String[] args)
   {
      PrintStream out = System.out;
      
      int rev = Integer.parseInt(args[0]);
      double radius = Double.parseDouble(args[1]);
      double dist = rev * 2 * Math.PI * radius;
      int m = (int) dist;
      double km = dist / 1000;
      
      out.println("Distance travelled is between ");
      out.println(m + " and " + (m + 1) + " meters");
      out.println("or at least " + ((int) km) + " kilometers");
   }
}