public class Number {
public static void main(String() args) {
System.out.println(6 + 2); // 8
System.out.println(6 - 2); // 4
System.out.println(6 * 2); // 12
System.out.println(6 / 2); // 3
System.out.println(Math.PI); // 3.141592653589793
System.out.println(Math.floor(Math.PI));
System.out.println(Math.ceil(Math.PI));
}
}