How To Cement A Court Making A Basketball Court?

Making a basketball court? - how to cement a court

behind my house, a large garden with lawn.
I have a basketball book. I think the size is adequate to 2 small, but I'm only a size, and it seems sufficient for my garden.
Can someone tell me how much does it cost?
I need to change the soil and the grass, to the land of basketball cement set something like that.

Thank you!