I think you have your W and H mixed up in your example and test suite.
Thanks James, I've fixed it now.
I also used round, but I not seen to be the best solution.
36.6/20.6==16/9 is false.
The values from the test suite are also inaccurate.
Swap the first and last columns
Column norms of a matrix
Reverse a matrix
Sum of the Matrix Elements
Cache me Outside
First N Perfect Squares
Parse me a Lisp
Test if a Number is a Palindrome without using any String Operations
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