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