I wasted 20 mins and I thought that i did sometching wrong until I Googled formula with brackets. But we should remember that ^ is performed before multiplication, division, and addition, so it is our fault, that we don't remember about order in math :d

I think the description should be (weight / (height ^2)) the current one is misleading

• No random tests (automatic downvote)
• Formatting string based on some condition is not a new or novel kata idea, and there's plenty of very similar katas already.