How can I create a custom Klarna OSM with code?

[GSJ]

Hello,

I was wondering if anybody is able to assist me with (hopefully a tiny piece of coding). I want to create a custom Klarna OSM as opposed to the placements they have already created as they're not the best, in my opinion.

I would greatly appreciate if someone could help me  with creating a little piece of code that automatically divides the product price by 3. So I can put text like 

'or pay in 3 interest-free instalments of /product price in bold/ with /klarna logo/'

If somebody could assist me with this I would greatly appreciate it

Thank you,