#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;
double r,R;
main()
{
	cin>>r>>R;
	double theta=2*asin(r/R);
	cout<<fixed<<setprecision(16)<<2*M_PI-theta<<endl<<4*r*R*(M_PI-theta/2)+M_PI*r*r<<endl;
}