[quack]

2600 sq acres = roughly 51 acres wide by 51 acres long or 10 acres by 260 acres,etc.,,
A large cube would be cubic acres,which is not possible,but cubic yards/ft is used when measuring something with three sides,as in length,width,depth.Like concrete or soil.
So,the commentator had it right.Square is used when measuring the length x width of something.Like a room or building.In this case they used acres.They could have said he has 102 acres,but I guess for effect they said it the way they did.

[quack]

OK,now I'm confused with the whole thing after re-reading my post.

[per loin]

2600 sq acres = roughly 51 acres wide by 51 acres long or 10 acres by 260 acres,etc.,,

51 acres wide? Uh...quack, how many feet long is an acre? Hint: you have confused measures of length with those of area.