#include<bits/stdc++.h>
using namespace std;
#define d double
int main()
{
    d n;cin>>n;
    cout<<fixed<<setprecision(4)<<n*2<<" "<<fixed<<setprecision(4)<<2*n*3.14159<<" "<<fixed<<setprecision(4)<<3.14159*n*n<<endl;
    return 0;
}