To display the Calculator window (see picture below), go to the Tools menu and click on the Calculator option or press the Calculator button on the toolbar.

This calculator will perform calculator functions and will displays results in decimal form with or without exponents, denoted as E.

The following operations can be performed:
C Clear
+ means Add
- means Subtract
* means Multiply
/ means Divide
+/- means Sign Change
e(x) means e power x
n! means n factorial
% means Percent
log means logarithm from x
Sq(x) means x square root
1/X means 1 divided by the number
X2 means x power 2
X3 means x power 3