#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>

using namespace std;

#define M_PI 3.14159265359

int main(){
	int c;
	cin >> c;
	int r_in, r_out;
	cin >> r_in >> r_out;

	cout << M_PI << endl;

	double S = 0.5*(r_out-r_in) * 0.5*(r_out-r_in)  * M_PI;
	double v = 0.5*(r_out + r_in) * 2 * M_PI * S;

	double ans = v*c;

	printf("%.6f\n", ans);
	return 0;
}