import java.util.*;

class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		double r = sc.nextDouble();
		
		double pi = Math.PI;//円周率
		double menseki = r * r * pi;//面積算出
		double ensyu = 2 * r * pi;//円周算出
		System.out.printf("%.6f %.6f",menseki,ensyu);//計算結果を６桁で表示
		
	}
}
/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