Simply, if you among others each own a small part of each of the 364 acres, they are saying if all the bits attributed to you personally were gathered into one spot, that spot would be 4.04 net mineral acres. The division order may be a shock to you also. If you are leased at 25% royalty, you will receive payment for what would come from 1.01 acres and there will probably be some costs and taxes taken out of that before you see the check or deposit. It is true that any money you get is more than you had before and you could be getting checks for a long time. I hope this helps and you get a monster of a well.