#include<stdio.h>
#include<math.h>
int main()
{
 int length;
 int breadth;
 double radius,rect_area,circle_area;
 scanf("%d",&length);
 scanf("%d",&breadth);
 scanf("%1lf",&radius);
 rect_area=length*breadth;
 circle_area=3.14*radius*radius;                                           
 printf("%d\n",(int)rect_area);
 printf("%d.2f\n",circle_area);
 return 0;
}