# include<stdio.h>
#include<math.h>
#define M.PI
int main()
{
    int length,breadth;
    double radius;
    scanf("%d",&length);
    scanf("%d",&breadth);
    scanf("%2lf",&radius);
    int rect_area = length * breadth;
    double circle_area = M.PI * radius * radius;
    printf("%d\n",rect_area);
    printf("%.2lf\n",circle_area);
    return 0;
    
}