#include<bits/stdc++.h>
  using namespace std;
  typedef long long ll;
  typedef pair<int, int> pii;
  #define MP(a,b) make_pair(a,b)
  int main() {
  	ios::sync_with_stdio ( false );
  	double r,d,z,m;
  	cin>>r;
  	d=r*2.0;
  	z=d*3.14159;
  	m=3.14159*r*r;
  	cout<<fixed<<setprecision(4)<<d<<" "<<z<<" "<<m;
  	return 0;
  }

#include<bits/stdc++.h>
using namespace std;
double r,d,z,m;
int main(){
    cin>>r;
    d=r*2.0;
    z=d*3.14159;
    m=3.14159*r*r;
    cout<<fixed<<setprecision(4)<<d<<" "<<z<<" "<<m;
    return 0;
}

#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int,int> pii; #define MP(a,b) make_pair(a,b) int main() { ios::sync_with_stdio(false); cin.tie(0); double n; cin>>n; cout<<fixed<<setprecision(4)<<n2<<" "; cout<<fixed<<setprecision(4)<<3.14159n2<<" "; cout<<fixed<<setprecision(4)<<nn*3.14159<<" "; return 0; }

#include<bits/stdc++.h> using namespace std; double r,d,z,m; int main(){ cin>>r; d=r2.0; z=d3.14159; m=3.14159rr; cout<<fixed<<setprecision(4)<<d<<" "<<z<<" "<<m; return 0; }

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