At the beginning of this page you can see this template which doesn't show properly: https://www.tematichedigenere.com/wiki/Iva_assorbenti_al_4%25,_%C3%A8_una_strumentalizzazione%3F
I've copied the template from Wikipedia, but the image (and probably the css) wasn't copied correctly. What am I doing wrong?
Refer to this answer for setting up InstantCommons to use media from Wikimedia Commons.
For the inputboxes, you have to install the InputBox extension.