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

//template
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define rrep(i,a,b) for(int i=(a);i>(b);i--)
#define ALL(v) (v).begin(),(v).end()
typedef long long int ll; const int inf = 0x3fffffff; const ll INF = 0x3fffffffffffffff;
template<class T> inline bool chmax(T& a,T b){ if(a<b){a=b;return 1;}return 0; }
template<class T> inline bool chmin(T& a,T b){ if(a>b){a=b;return 1;}return 0; }
//template end



int main(){
    double r,R; scanf("%lf%lf",&r,&R);
    double t=2*M_PI-acos((R*R*2-r*r*4)/(R*R*2));
    double s=((R+r)*(R+r)-(R-r)*(R-r))*t/2;
    s+=r*r*M_PI;
    printf("%.12f\n%.12f\n",t,s);
    return 0;
}