How to perform multiple calculation based on user input

I would like to create a multiple calculation based on the entries chosen by the users, is that possible?

Hello Eligendo, performing calculations (regardless if it's single or multiple operations) should be achievable. However, the extent of that possibility highly depends on what you're trying to do.

To perform calculations based on user's input, you may either use Conditions or the Form Calculation Widget. We have a couple of detailed guides that should help you get started.

Related guides:

Smart-Forms-Using-Conditional-Logic

How-to-Perform-Calculation-in-the-Form

How-to-Assign-Calculation-Value 

Form-Calculation-Math-Function-Reference