title: How do I calculate a scalar product in a sympy vector?
body: <p>Pretty simple question:</p>
  
  <pre class="lang-py prettyprint-override"><code>from sympy.vector import Vector
  v = Vector(0, 2, 1)
  print(2*v)
  </code></pre>
  
  <p>Output expected:
  Vector(0, 4, 2)</p>
  
  <p>I'm unable to find how to do this, the docs do not talk about scalar product.</p>