#include<bits/stdc++.h>
using namespace std;
int main(){
    double r,d,c,s,pi=3.14159;
    cin>>r;
    d=r*2;
    c=2*r*pi;
    s=pi*r*r;
    printf("%0.4f,%0.4f,%0.4f",d,c,s);
    return 0;
}