Formula to Convert [h]:mm:ss to d:hh:mm:ss ; where each 7.5 hours = 1 day

Hello! So I was looking through the forum and found some formula that are kind of similar to what I looking for but with one exception:

I will like to convert [h]:mm:ss to d:hh:mm:ss ; where each 7.5 hours = 1 day.

Ex. 7hr 30min 00sec = 1day 0hr 0mm 0s

8hr 30min 00sec = 1day 1hr 0min 0sec

9hr 45min 00sec = 1day 2hr 15min 0sec

I don't know if there is a formula for this, but if anyone can create one, I will be very grateful!!!

Thanks!!

Is a text, where the cells are modified as [h]:mm

I was able to convert 7:30:00 to 1:00:00:00 by multiplying the cell with 24/7.5, but if I do the same with 8:30:00, it give me 1:3:12:00.