How to add a pop-up screen with a couple of logics?

Hello everyone,
I am trying to add a pop-up screen that shows the results of participants' response before they move on to the next page.
In my current design, participants will see an 'empty text box' where they can put a number ranging from 0 to 100. Each number represents a number of assets that affect their investment decisions. So, I want to add a pop-up screen that shows investment results as a consequence of the number they chose, such as, "You invested XX assets. As a result, your earnings will be $YY (XX * $0.ZZ). Please click Next to continue. If you want to change the answer, click cancel."
Another option could be showing the result of the investment decision (the same as the above sentence) on the same screens as participants put in their numbers, without having to put any numbers in the pop-up screen.
I am not sure whether I should use the HTML template or if there could be any easier ways to do so.
I would appreciate any tips you might have. Thanks in advance for your help!