Google Search has many things to do along with normal searching. The way you check temperature of any city or see currency conversion rate, you can also calculate using scientific calculator.
How to use Calculator in Google search?
All you need to type what you want to calculate.
For ex : 9% of 653,
4 * 8 (to multiply)
435 – 269 (to subtract)
and so on………
You can type these stuffs in Google Search, and when you press Enter key, Calculator will appear in the search result automatically.