I’m not really sure it’s really complicated
I don’t know if that’s what you wanted but I hope I helped ;D (sorry for my bad english)
Another name for a square corner is Vertex
Thats the same thing as 0.3 x 10
when mulitplying by 10, 100, 1000, etc.
what i do is i move the decimal place over how many zeros there are so there is one zero and that means you need to move the decimal place over one space to the right so the answer is
3