How to caculate HB's number of window?

Hi everyone
please to see the photo below

There are two house which are same window-to-wall ratio, which is 0.3


Left house detail :
1.wwr = 0.3
2. _horiz_seper = 1 ((as my understand, it means that each window’s centerlines distance is 1
3. number of window is 20

Right house detail :

  1. _wwr = 0.3
  2. _horiz_seper = 9
    3. number of window is 2
    other settings are default

so my question is :
How to caculate number of window?
is it having any formula to caculate?