Own Bussiness Java

package OldExams;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class OwnBussiness {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        int w = Integer.parseInt(reader.readLine());
        int l = Integer.parseInt(reader.readLine());
        int h = Integer.parseInt(reader.readLine());
        int n = 0;
        int space = w * l * h;
        int freespace = 0;

        String command = reader.readLine();

        while (!command.equals("Done")){
            n = Integer.valueOf(command);

            if (space >= n){
                space -= n;
                command = reader.readLine();
                continue;
            }
            freespace = n - space;
            break;

        }
        if (freespace == 0){
            System.out.printf("%d Cubic meters left.",space);
        }else {
            System.out.printf("No more free space! You need %d Cubic meters more.",freespace);
        }
    }
}