Hi! Can any of the webmasters recommend a good plugin or an online service for creating an online calculator? In the search I looked, I found several, but I can not make a choice. We need as simple a tool as possible so that we can add ready-made forms with fields and lists, and then add the formulas themselves and build a calculation of the data that will be entered by users. It would be nice to be able to display the results of the calculation and send them to email.