Hmmm. Using this same calculater, with Panasonic Home, PT-AE4000U, English units, Throw range at 12 ft., Aspect at 2.35, I get 81 x 35, 88 diag.
Everyone does this when they first start using it, I did it as well.
Don't use the + and - to the right of the slider bars to change the screen size or throw. Use the box in the top left and click on "diagonal range" or "throw range" then you can change them independently.
12' throw, 110" 2.35 and .08 gain is basically bang on perfect. Just make sure the room can go DARK with that gain, otherwise use the 1.0 gain. You want the fl to be in the 13 - 16 range ideally, too high is fine you can just turn the projector down.
