Comment by jefftk

This isn't just pixels, it's the normal way we use rectangular units in common speech:

* A small city might be ten blocks by eight blocks, and we could also say the whole city is eighty blocks.

* A room might by 13 tiles by 15 tiles, or 295 tiles total.

* On graph paper you can draw a rectangle that's three squares by five squares, or 15 squares total.