I think I found the Inductance as
B=
0.003628192286234499 which is
3.628192286234499 mH How is inductance derived from this?
I think you're making it more complicated than you need to.
For now, just take the Al (L is a subscript) value from the core datasheet, and multiply that by the square of the turns.
Leave it to the core manufacturer to figure out what the Al is for any given core.