Earlier quoted context omitted.
Makes sense. That’s what I would have thought if not for the area of a sphere in three dimensions remark.
Area = surface area not volume. Physicists tend to drop constant factors when they do calculations, I’ve noticed.
When talking about dropping a constant factor are you referring to the 1/r^2 part or dropping a 4 in the statement A=pi r^2. Because if the latter then why keep pi? That’s a constant.