import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.IOException;

import java.math.BigDecimal;

import java.math.MathContext;

public class CircleInfo{

public static void main(String[] args){

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

try{

do{

System.out.println("Enter the radius of the circle:");

String text = br.readLine();

double radius = Double.parseDouble(text);

System.out.println("Circumference: " + getRoundedResult(2*Math.PI*radius));

System.out.println("Area: " + getRoundedResult(Math.PI*radius*radius));

System.out.println();

}while(true);

}catch(NumberFormatException nfe){

nfe.printStackTrace();

}catch(IOException ioe){

ioe.printStackTrace();

}

}

static double getRoundedResult(double original){

BigDecimal bd = new BigDecimal(original);

bd = bd.round(new MathContext(3));

return bd.doubleValue();

}

}