#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int,int> pii; #define MP(a,b) make_pair(a,b) int main() { ios::sync_with_stdio(false); cin.tie(0); double n; cin>>n; cout<<fixed<<setprecision(4)<<n2<<" "; cout<<fixed<<setprecision(4)<<3.14159n2<<" "; cout<<fixed<<setprecision(4)<<nn*3.14159<<" "; return 0; }