A product that overflows before it reaches a long

public class Main {
    public static void main(String[] args) {
        long wrong = 24 * 60 * 60 * 1000 * 1000;
        long right = 24L * 60 * 60 * 1000 * 1000;
        System.out.println(wrong);
        System.out.println(right);
    }
}