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This is located at www.Google.com, the same page from which you can conduct searches or access other Google applications using the menu in the top, righthand corner of the screen. If you use Google Chrome's default search engine or have otherwise set Google as your preferred search engine, you need not go to www.Google.com. Simply enter your equation in the search bar near the top of your window and hit ⏎ Return. Google can handle arithmetic, functions, the values of physical constants along with base and representative conversions. Simply type in the equation or problem you need solved. After typing the mathematic query, hit ⏎ Return.  You can also access a more traditional-looking calculator by performing a Google search for "calculator." You can still type numbers and equations into the calculator's text field, but you can also point and click on the calculator's various keys and functions. Google's search bar will recognize a number of operations that include + (addition), - (subtraction), * (multiplication), / (division), ^ (exponents) and sqrt(number) for square roots. You can also find a number of more advanced tips for what to type at http://www.googleguide.com/help/calculator.html. Google's calculator will automatically appear and show you the answer to your query.
Navigate to the Google homepage. Have Google solve your problem. Check your answer.