#include<bits/stdc++.h>
using namespace std;
int main(){
	double r,d,c,s,pi=3.14159;
	cin>>r;
	d=2*r;
	c=2*r*pi;
	s=pi*r*r;
	printf("%0.4f %0.4f %0.4f",d,c,s);
	return 0;
}