#include<bits/stdc++.h>
using namespace std;

int main(){
	int r;
	float s,c,pi;
	cin>>r>>pi;
	s=r*r*pi;
	c=r*2*pi;
	cout<<fixed<<setprecision(2)<<s<<endl;
	cout<<fixed<<setprecision(2)<<c;
	return 0;
}

/**************************************************************
	Problem: 1005
	User: linmiaoling
	Language: C++
	Result: Wrong Answer
****************************************************************/