Create a Custom Field that auto computes numbers entered

If there is a need for a field to be used to compute numbers like a calculator, then a Custom Field can be created.

1.    Navigate to Customization > Lists, Records, & Fields > select field type > New.

2.    Put a label.

3.    Type = Currency.

4.    Applies To tab > record to be displayed

5.    Display tab > Subtab Main

6.    Save

Result:  Navigate to the Record where the Custom Field was applied and enter a string of number operations.

Eg: 1 + 2.75 + 10 - 3, then "tab out" = 10.75