title: 9.4.2: Function definition: Volume of a pyramid with modular functions
body: <p>I'm not sure where I'm off at, here is the ask.
  Define a function calc_pyramid_volume() with parameters base_length, base_width, and pyramid_height, that returns the volume of a pyramid with a rectangular base. calc_pyramid_volume() calls the given calc_base_area() function in the calculation.</p>
  <p>Relevant geometry equations:
  Volume = base area x height x 1/3
  (Watch out for integer division).</p>
  <p>Sample output with inputs: 4.5 2.1 3.0
  Volume for 4.5, 2.1, 3.0 is: 9.45</p>
  <p>Naturally, my code is not working.</p>
  <pre><code>def calc_base_area(base_length, base_width):
      return base_length * base_width
      
  def calc_pyramid_volume(base_area, pyramid_heigth):
      return calc_base_area * pyramid_heigth 
      
  length = float(input())
  width = float(input())
  height = float(input())
  print('Volume for', length, width, height, &quot;is:&quot;, calc_pyramid_volume(length, width, height))
  </code></pre>