#include <bits/stdc++.h> 
using namespace std;
int main()
{
    double r,d,c,s;
    d=r*2;
    c=d*3.14159;
    s=3.14159*(r*r)
    cout<<setprecision(4)<<d<<" "<<setprecision(4)<<c<<" "<<setprecision(4)<<s;
    return 0;
}