1

#include<iostream>
#include<cmath>
using namespace std;
int main(){
	double r,PI=3.14159;
    cin>>r;
	printf("%.4f",r*2);
	cout<<" ";
	printf("%.4f",r*2*PI);
	cout<<" ";
	printf("%.4f",r*r*PI);
	return 0;
}