#include<stdio.h>
int main(){
    int length,breadth;
    double radius;
    
    scanf("%d",&length);
    scanf("%d",&breadth);
    scanf("%lf",&radius);
    if (1>length,breadth>10000){
        if (0>radius>10000){
            printf("invalid output")
        }
        
    }
    
    int areaRectangle = length*breadth;
    double areaCircle = 3.14159*radius*radius;
    
    printf("%d\n",areaRectangle);
    printf("%.2f\n",areaCircle);
   
}