I was making a genuine request for help to confirm I calculated right. What's your problem?
Dude, lighten up. You gotta admit that it was a pretty fucking retarded question to ask given the fact that... a) as I said, the mathematical problem could easily be solved by elementary school students due to its complete lack of complexity and b) calculators are kinda common these days, ya know, and unless you're posting to Blue's from some seriously weird pure command line OS there is an excellent chance that your OS has a built-in calculator, too! So the answer to your question was most likely just a couple mouse clicks and a few keystrokes away and certainly a lot less effort even than creating that post of yours. But hey we all have our little dumbass moments some time so iz no big deal. Don't worry about it, pal.