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