How to find advanced options in the Calculation widget?

I am a new user. I do not find the "advances options" in the calculation widget. How couls I do? Thanks in advance.

You can see the option "Show Advanced Options" when you open the Calculation wizard on the form. Please see the screencast below:

If you are referring to something different, please let us know. We will be happy to assist. 

Thank you for your answer. I am very impressed by the speed! But... I saw on many of your tutorials, discussions, forums, etc. the words "Advance options" in the bottom, on the left, of the screen of the widget calculation. In the version I use (in Europe), in the screen of the widget, there are no such words that can be clicked at that place. The layout and the colors of the materials are also different. Black symbols, "Add field" in white with a blue background, etc.  Why?

1. Is it because I use a free version?

2. I tried with the English language version but the problem remains the same.

3. Or something else I am doing wrong?

My purpose is simple, as you can see on https://form.jotformeu.com/62946870879376 : I use a form to allow the people to order wines and other food.

Under the lines "Foie Gras", there are the fields for the reference (Article), the type of foie gras, and the price. All these fields are read only. The next one is the ordered quantity, entered by the consumer and NOT read only of course. The last one is the result of the calculation "price x quantity" which give as result the amount of the order in euros.

I do not want that the consumer could change the result of the calculation ! But he can do that. Indeed, when I make tests on the form, I can change the figure in the box. 

Therefore I would like to use the option "read only" in the widget, but I don't find it.

Sorry for my poor english.

You must be referring to the new version of the calculation wizard. The new wizard is being rolled out to all the users in phases. You can access the Advanced options of the calculation wizard by clicking on ... button on the numeric keypad. Please see the screencast below:

You may mark the calculation field as read only by selecting the option Result field is read only from Options.

Hope this information helps!