Professional environment is a more formal environment. It could be a work environment. In this environment formal behavior is important because formality boosts the performance. Indeed, it might be dealing with the seriousness of the issue. Let us just imagine vice-versa. When the work is not serious, it cannot create responsible environment because some people will free ride. Therefore, professional environment has its own standards in comparison with personal environment. Personal environment can also be formal, but it is not a necessity.
Do you mean multiplication?
1 x 64, 2 x 32, 4 x 16, 8 x 8
