Simplify the following text for a Grade 9 native English-speaking person.
Original: A Regional Casino , more commonly known as a Super Casino ( or occasionally known as Mega Casino or other variants ) , is the term given to the largest category of casino that was to have been permitted under UK law - equivalent in size to the larger casinos in Las Vegas .
Simplified: A Regional Casino , more commonly known as a Super Casino ( or occasionally known as Mega Casino ) , is the term given to the largest category of casino that was to have been permitted under UK law . It is meant to be the same size as the larger casinos in Las Vegas .