Google is a good first place to search, but Wolfram Alpha goes places Google doesn’t, and you should add it to your searching strategy, especially if you’re a student, or engage in business transactions, or if you are just a curious person.
Actually, Wolfram Alfa calls itself an “Answer Engine” and that is accurate. You can ask questions and get answers, including math calculations, and all the other possibilities you can find out about here: http://www.wolframalpha.com/examples/
So add Wolfram Alpha to your bookmarks, wherever you save them - on your favorite browser, on your NewsReader, or in a notebook that you keep on your desk. And spend some time asking Wolfram Alpha questions, so you can see what it can do!