"efficient" circle packing

Hello everyone,

I am new in grasshopper and i am using the circle packing. Until now i was using a tool ,which i attach, from Systemiq (whom i am really thankful to for sharing it with me!).

But now i want to do something different. I want the circles to be placed in a "radius logic" around a central fixed circle into the outside circle in order to leave the minimum empty space. what i want to control is the size of 2 circles, the central and the outside . i don't mind if the filling circles are not all equal but i want to know their surface after they are revolved (probably with the brep tool...), just like the attached image.

Does anyone has an answer?

Thank you!