2.35:1 = x:9 --> x = 21.15
2.35:1 = 16:x --> x = 6.8
That leaves (9-6.8)/2 = 1.1 on top and at the bottom if you want to see the full width.
when ever I am watching a movie from a DVD, I've notice that the movies still have the black bars as if I was watching it on a 4:3 tv. I did look at the back of the DVD case and it said it was anamorphic widescreen 2.35:1. Does that mean it is not 16:9 and that is the reason the movie does not take up the full screen? I know that it is not my tv's zoom because it is set on standard which shows the video as it comes. Can anyone explain this to me?