If you're talking about this question...
...then I wouldn't argue that it's too simple. Any question can be extremely straightforward, and there shouldn't be any prejudice to a simple problem.
The main issue that I see with it is that it demonstrates a lack of effort or attempt to research the problem beforehand. It's more or less a homework dump - I need to solve X, how do I solve X.
I wouldn't let downvotes get you down too much - if you add more "here's what I tried" to these sorts of questions, people tend to look at them more favorably.