#include<iostream>
#include<iomanip>
#define PI 3.14159
using namespace std;
int main(){
	double r;
	cin >> r;
	cout << fixed << setprecision(4) << r*2 << " ";
	cout << fixed << setprecision(4) << PI*2*r << " ";
	cout << fixed << setprecision(4) << PI*r*r << " ";
	return 0;
}

#include<cstdio>
#include<iostream>
using namespace std;
const double PI= 3.14159;
int main(){
    double r, d, c, s;
    cin>>r;
    d = r*2;
    c = 2 * PI * r;
    s = PI * r * r;
    printf("%.4lf %.4lf %.4lf", d, c, s);
    return 0;
} 

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

#include<bits/stdc++.h>
using namespace std;
long long q,w,e,r,t,y,u,i,o,p,d,f,g,h,j,k,l,z,x,c,v,b,n,m;
string s;double dd,ee,ff=3.14159;
long long a[100000],as[100000],asd[100000];
int main()
{
	cin>>dd;
	cout<<fixed<<setprecision(4)<<dd*2<<" "<<dd*2*ff<<" "<<dd*dd*ff;
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
long long q,w,e,r,t,y,u,i,o,p,d,f,g,h,j,k,l,z,x,c,v,b,n,m;
string s;double dd,ee,ff=3.14159;
long long a[100000],as[100000],asd[100000];
int main()
{
	cin>>dd;
	cout<<fixed<<setprecision(4)<<dd*2<<" "<<dd*2*ff<<" "<<dd*dd*ff;
    return 0;
}