title: How to multiply two matrices together in Python
body: <p>I am trying to multiply to matrices together using only Python. To keep it simple, we'll say that they will always be the same size. I have tried so many different ways, but haven't figured it out. Here are the two matrices:</p>
  <pre class="lang-py prettyprint-override"><code>matrix_a = [[1, 2, 3], [1, 2, 3], [1, 2, 3]]
  matrix_b = [[3, 2, 1], [3, 2, 1], [3, 2, 1]]
  </code></pre>