#include<stdio.h>
int main(){
    int length,breadth;
    double radius;
    scanf("%d",&length);
    scanf("%d",&breadth);
    scanf("%lf",&radius);
    
    int area rectangle = length*breadth;
    double area circle = 3.14159*radius*radius;
    
    printf("%d\n",area rectangle);
    printf("%.2f\n",area circle);
    return 0;
}