After performing a very detailed mathematical analysis, noting that the total area of a circle is π r², and after taking precise measurements and observing the object in question with a critical eye, I’ve finally determined the most efficient way to consume pumpkin pie.
Please consult the following photograph:

HAPPY THANKSGIVING!
You have the system down pat!!
https://pacificparatrooper.files.wordpress.com/2018/11/happythanks01-1.gif
Yes the only way