Notes to future self:

1. Watch out for integer division!
   9 / 10 # => 0 🤔

2. Order of operations matters!
   Float(9/10) # => 0.0 🤔🤔

3. Ruby has you covered!
   Float(9)/10 # => 0.9 😀
9.to_f/10 # => 0.9 😀
9.fdiv(10) # => 0.9 😀