package ogorod; 
import java.util.Scanner; 
 
public class Ogorod { 
 
public static void main(String[] args) { 
Scanner in = new Scanner(System.in); 
System.out.println("Введите a"); 
int a = in.nextInt(); 
System.out.println("Введите m"); 
int m = in.nextInt(); 
System.out.println("Введите n"); 
int n = in.nextInt(); 
int kol; 
 
int x, y; 
x=m/a; 
y=n/a; 
if (m%a!=0) 
x=x+1; 
if (n%a!=0) 
y=y+1; 
kol = x*y; 
System.out.println(kol); 
}}