The calculator in the search box:
CALCULATOR Operators Meaning Type Into Search Box (& Results)
+ - * / basic arithmetic 7 + 3 - 5 * 3 / 2
% of percentage of 10% of 120
^ or ** raise to a power 3^4 or 3**4
old units in new units convert units 100 Euros in USD, 80 lbs in kg, or 16 in hex