import java.io.*;
public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
        String str=buf.readLine();
        double x=Double.parseDouble(str);
    
        String f=String.format("%.6f",(double)x*(double)x*3.141592653589);
        String t=String.format("%.6f",(double)x*2*3.141592653589);
        System.out.println(f+" "+t);
    }
}
/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