#include <bits/stdc++.h>

#define M_PI       3.14159265358979323846   // pi

using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> VI;
typedef pair<ll, ll> P;
typedef tuple<ll, ll, ll> t3;

#define rep(a,n) for(int a = 0;a < n;a++)
#define repi(a,b,n) for(int a = b;a < n;a++)

const ull mod = 1000000007;

int main(void)
{
	double r, R;
	cin >> r >> R;
	double theta = asin(r / R);
	double t = M_PI * 2 - theta * 2;
	double area = 4 * R * r * (M_PI / (2*M_PI) * t) + M_PI * r * r;
	cout << std::fixed << std::setprecision(10);
	cout << t << endl;
	cout << area << endl;
	return 0;
}