#include<stdio.h>
int main()
{
    int l,b;
    double r;
    scanf("%d %d",&l,&b);
    scanf("%lf",&r);
    int area_of rectangle=l*b;
    double area_of_circle=3.1415*r*r;
    printf("%d\n",area_of_rectangle);
    printf("%.2lf\n",area_of_circle);
    return 0;
}