To use Google's built-in calculator function, simply enter the calculation you'd like done into the search box.
How to use the Google calculator
Google’s calculator tries to understand the problem you are attempting to solve without requiring you to use special syntax. However, it may be helpful to know the most direct way to pose a question to get the best results. Listed below are a few suggestions for the most common type of expressions (and a few more esoteric ones).
Most operators come between the two numbers they combine, such as the plus sign in the expression 1+1.