#include <stdio.h>
using namespace std;
int main() {
    const double pi = 3.1415926;
    double radius, height; 
    double circle_area, circumference, surface_area;  
    scanf("%lf %lf", &radius, &height);
    circle_area = pi * radius * radius;
    circumference = 2 * pi * radius;
    surface_area = 2 * circle_area + circumference * height;
    printf("圆柱体表面积为：%.2lf\n", surface_area);
    return 0;
}
/**************************************************************
	Problem: 1623
	User: fuhoubin
	Language: C++
	Result: Wrong Answer
****************************************************************/