#include <stdio.h>

int main()
{
int length, breadth;
double radius;
double areaCircle;

scanf("%d", &length);
scanf("%d", &breadth);
scanf("%1f", &radius);

int areaRectangle = length * breadth;
areaCircle = 3.14159 * radius * radius;

printf("%d\n", areaRectangle);
printf("%.2f", areaCircle);

return 0;
}