Return days base on 360 calendar days

Hello everyone,

I would like to write a simple query which return me days on base of 360 calendar days for example, when i write bellow query, it returns me days on base of 365 days:

select to_date('15-feb-2018')-to_date('15-Nov-2017'),  'mid-feb' label1 from dual

union all

select to_date('15-Aug-2018')-to_date('15-Nov-2017'),  'mid-aug' label1 from dual

Results:

  

Actual Result	Desire result
92	90	mid-feb
273	270	mid-aug

  

Mid Feb
	Desire Result	Actual result
17-Nov	16	16
17-Dec	30	31
18-Jan	30	31
18-Feb	14	14
	90	92

  

Mid Aug
	Desire Result	Actual result
17-Nov	16	16
17-Dec	30	31
18-Jan	30	31
18-Feb	30	28
Mar-18	30	31
Apr-18	30	30
May-18	30	31
Jun-18	30	30
Jul-18	30	31
Aug-18	14	14
	270	273

   

Desire Result