#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  double r, R;
  cin >> r >> R;

  double theta = asin(r/R);
  double t = 2 * PI - 2 * theta;
  double s = (PI - theta) * 4 * R * r + PI * r * r;
  
  cout << fixed << setprecision(9);
  cout << t << endl;
  cout << s << endl;
  
  return 0;
}