Ever need to do a quick calculation, but don’t feel like digging through your drawers to find a calculator or navigating though your OS to find the calculator program? Well, I’ve got good news for you. Simply hit Command-Spacebar to open up the Spotlight search on the top right of your screen, type whatever calculations you need done, and it’ll instantly give you your answer. If you need to do more, just hit enter and it’ll also open up Mac OS X’s built-in calculator application.