
import java.util.Scanner;

class Main {
	public static void main(String args[]){
		
		//スキャナーで半径rを読み取る
	    Scanner sc = new Scanner(System.in);
	    String s1 = sc.next();
	    double r = Double.parseDouble(s1);
	    
	    //面積sと円周lを求める
	    double s = Math.PI * r * r;
	    double l = Math.PI * (r + r);
	    
	    //面積sと円周lを表示する
	    System.out.println(String.format("%1$3f",s) + " " + String.format("%1$3f",l));
	    
		
	}

}
/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