import java.util.Scanner;

class Main{
    public static void main(String[] args){
        double r,area,length;
    	//?¨??????\??????????????????????????§????????????
		Scanner scanner = new Scanner(System.in);

		r = scanner.nextDouble();

    	area = r*r*Math.PI;
    	length = 2*r*Math.PI;
    	//println?????¨??¨??????1.0E9??¨????????????AOJ??????????????¨
    	//??????????????????????????§printf????????¨???
    	System.out.printf("%f %f",area,length);
    	scanner.close();
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz