Improved the example with numbers that can be exactly represented as floats and added a comment with the solution.
Improved the example with numbers that can be exactly represented as floats and added a comment with the solution.

graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust