Can i ask about CFrame because i don't have any idea why they're multiplying it by themselves?

for example: part.CFrame = part.CFrame * CFrame.new(0, 0, 0) just like this it have a multiply i am just curious about why it needed to add multiply in there

Here is a list of things you can use with CFrames via operators, and a description of what it does.

A lot of people don't both learning how CFrame works in the technical sense, but it's good to know how to rotate and move CFrames around, and that should help with that.