How to divide a line or arc into equal segments?

It is so embarrassed telling the truth here, although I have been using sketchUp for quite a long time, but recently just noticed that it's a very useful command, which is to divide a line or arc into equal segments.

So, from now on, I can throw my calculator away from and desk and say bye bye.

Here is the demonstration step by step. Let's feel free to test it out.

1. First, you need to right click on the line or arc to display the menu (blue arrow, click on the "divide"), 
2. you will see some red-spots, moving left-right or key in the number of segments you would like to have.
3. Draw lines to split the surface.

That's it, easy huh...