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