Hi.
It’s difficult to grasp your context with just one (messy) picture.
Please, have a look here: How to ask effective questions
Anyway.
12 Lines crossing other 25 lines create a grid of 11*24=264 cells, not 300.
If i got it wrong, indeed, please attach some relevant data about your situation.
In the meantime, look at this areas.gh (10.3 KB)