// editor5
#include<stdio.h>
#include<math.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

int main(){
    int r,h;
    if(scanf("%d %d", &r,&h) != 2){
        if(r<0||h<0){
            printf("Invalid input\n");
            return 0;
        }
    }
    if(r<0||h<0){
        printf("Invalid input\n");
    } else {
        double surface_area=2 *M_PI*r*(r+h);
        double volume=M_PI*r*r*h;
        
        surafec_area=round(surface_area*100.0)/100.0;
        volume=round(volume*100.0)/100.0;
    }
    return 0;
}