#include<stdio.h>
int main()
{
    int r, h;
    scanf("%d", &r);
    scanf("%d", &h);
    if(r < 0 || h < 0){
        printf("Invalid input");
        return 0;
    }
    float surface;
    SurfaceArea = 2*314*r*(r + h);
    printf("Surface Area: %.2f", SurfaceArea);
    return 0;
}