#include<bits/stdc++.h>
using namespace std;
double r=5.0,pai=3.141593;
int main()
{
    cout<<pai*r*2<<endl<<pai*r*r<<endl<<pai*r*r*r*4/3;
	return 0;
}

using namespace std;
int main()
{
  double pai= 3.141593;
  int R = 5;
  cout<<2*pai*R<<endl;
  cout<<pai*(R*R)<<endl;
  cout<<pai*(R*R)*4/2;
   
	return 0;

}