#include<bits/stdc++.h>
using namespace std;
int main()
{
    double r;
    cin>>r;
    double pai=3.14159;
    printf("%.4f %.4f %.4f",2*r,2*pai*r,pai*r*r);
    return 0;
}

#include <iostream>
#include <cmath>
#define int long long
using namespace std;
const double pi=3.14159;
double x,a,b,c,d;
signed main(){
	cin>>x;
	printf("%.4f %.4f %.4f",2*x,pi*2*x,pi*pow(x,2));
//	cout<<'%';
}