#include<iostream>
#include<cstdio>
#include<cctype>
#include<string.h>
#include<math.h>
#include<cmath>
#include<algorithm>
#include<iomanip>
using namespace std;
int main()
{
	double r;
	double pai=3.14159;
	cin>>r;
	printf("%.4lf",2*r);
	cout<<" ";
	printf("%.4lf",2*pai*r);
	cout<<" ";
	printf("%.4lf",pai*r*r);
	return 0;
}