#include <stdio.h>
#include <conio.h>
#include <math.h>
#define PI 3.14159
int main() {
int r;
float s, v;
printf ("Nhap ban kinh r: ");
scanf("%d", &r);
s = 4*PI*r*r;
v = (4/3)*PI*r*r*r;
printf("Dien tich: %6.2f\n", s);
printf("The tich la: %6.2f", v);
getch();
}