#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#include <utility>
#include <functional>
#include <time.h>
#include <stack>
#include <array>
#define popcount __builtin_popcount
using namespace std;
typedef long long int ll;
typedef pair<ll, ll> P;
const double PI=acos(-1.0);
int main()
{
    double r, R;
  cin>>r>>R;
  double a=2*asin(r/R);
  printf("%.6lf\n", 2*PI-a);
  printf("%.6lf\n", PI*((R+r)*(R+r)-(R-r)*(R-r))*(1-a/(2*PI))+PI*r*r);
    return 0;
}