#include <stdio.h>

int main(void) {
    int length, breadth;
    double radius;
    const double PI =
    3.141592653589793;
    
    if (scanf("%d", &length) != 1)
    return 0;
    if (scanf("%d", &breadth) != 1)
    return 0;
    if (scanf("%1f", &radius) != 1)
    return 0;
    
    int rect_area = length * breadth;
    double circle_area = PI * radius * 
    radius;
    
    printf("%d\n", rect_area);
    printf("%.2f\n", circle_area);
    
    return 0;
}