The `0.201168` looks like a "magic" number here. Instead, I'd like to see a constant "KM_PER_MILE"

Or, if you'd like to not do constants, you can still keep everything defined in the method:

```ruby
def furlong_to_kilometers(furlong)
  return furlong * furlong_per_mile=0.201168
end

furlong_to_kilometers 1
=> 0.0201
```

Note I don't love this, but at least future-you can tell what 0.201168 means