title: Multiplying values from two different dictionaries together in Python
body: <p>I have two separate dictionaries with keys and values that I would like to multiply together. The values should be multiplied just by the keys that they have. </p>
  
  <p>i.e. </p>
  
  <pre><code>dict1 = {'a': 1, 'b': 2, 'c': 3}
  dict2 = {'a': 15, 'b': 10, 'd': 17}
  
  dict3 = dict.items() * dict.items()
  print dict3
  
  #### #dict3 should equal 
  {'a': 15, 'b': 20}
  </code></pre>
  
  <p>If anyone could help, that would be great. 
  Thanks!</p>