Trawling the Web for answers is Google's forte, and Google search has already included some useful functions like using images to search. Now Google search has gotten more impressive and useful by including a full-fledged scientific calculator.
In the past, entering the start of an equation like 2+2 for example, would yield the answer in the search result. Entering the same query this time round will not only get you the answer, but also bring up a scientific calculator. This calculator also works if you're using a mobile browser or voice search too. The calculator includes almost all the functions of an actual physical scientific calculator and you can launch it in Desktop Voice Search by saying "calculator" or stating an equation.