import java.util.Scanner;
public class CodesCracker
{
public static void main(String[] args)
{
float r, circum;
Scanner s = new Scanner(System.in);
System.out.print("Enter the Radius of Circle: ");
r = s.nextFloat();
circum = (float)(2*3.14*r);
System.out.println("\\Circumference = " +circum);
}
}