How to make the Calculation field a read-only?

hi, I could do the calculation, Thanks. But now I need the calculation field can not be modified by the user. I do multiplition well but the user can then change the result and, I do not see any option that makes it read only. help

Here's a guide on how to make the Form Calculation a read-only:

1. Open the form in Form Builder.

2. Select the Form Calculation widget.

3. In the Form Calculation wizard, click the "..." button.

4. Go to the Options tab and check the "Result field is read-only"

5. After that, click the Back button and Save the Form Calculation when you're done.                                                                                                  

Thanks you. good luck