#include <stdio.h>
#include <string>
#include <cstring>
#include <stdlib.h>
#include <math.h>
#include <algorithm>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <list>
#include <iterator>
#include <assert.h>
#pragma warning(disable:4996) 
 
typedef long long ll;
#define MIN(a, b) ((a)>(b)? (b): (a))
#define MAX(a, b) ((a)<(b)? (b): (a))
#define LINF 9223300000000000000
#define INF 2140000000
const long long MOD = 1000000007;
//const long long MOD = 998244353;
using namespace std;

const double PI=3.141592653589793238462643;

int main(int argc, char* argv[])
{
    double r,R;
    scanf("%lf%lf", &r, &R);

    double t=asin(r/R);
    double a=PI*2-t*2;
    double b=4*R*r*a/2 + r*r*PI;
    printf("%.10lf\n%.10lf\n", a, b);

    return 0;
}