title: How to convert this list to int
body: <p>I have the following list:</p>
  
  <pre><code>[['3*4'],
   ['7*8*1'],
   ['8*2*4']]
  </code></pre>
  
  <p>And I want to convert that to int like this and it should caluclate the figures:</p>
  
  <pre><code>[[12],[56],[64]]
  </code></pre>
  
  <p>this is what ive already tried:</p>
  
  <pre><code>newList= list(map(int, oldList))
  </code></pre>
  
  <p>How to do that?</p>