I currently have 4 hives in one location and 3 in another.
You can compare what is the difference between thes elocations. How much hives get honey.
Good yied depends on pastures and how far bees bring the yield. It depends too how big are hives, have they 4 or 8 boxes.
I have found that in different places yield is easily 3 fold and even 5 fold and the distance between places is not many miles.
If bees brings nectar from distance more than 1 km, 50% of yield goes into flying.
Australia has researched quite much, what means the number of hives in one place or in several. Results are very interesting.