python - Django template : use a filter result as an argument to a second filter -

What do I want to achieve, doing a calculation in the DNS template, this will be in plain math:

  section_angle = base_angle + (sections_length / current_iteration_counter_over_sections)   
 When it tries to translate it into the projected templates, I think that something like this might happen:  
  {% section in section%} {%} with base_angle added: section | Length | Splits: divides withloop.counter0 to section_angle%}   
 custom   
  def partition (value, absolute): Returns Float (param) / float (value)   
 I see the bit confused about how to arrange it, using the filter and the logic I should use with the example shown here , It leads to an error:  while presenting the captured value: Could not convert string to float:  
 
 
 
 If you have a background in programming, or if you mix directly the programming code in languages ​​in HTML, then you? Do you want to keep in mind that the Django templates system is not only embedded in Python HTML, it is according to the design: the template system is meant to express the presentation, not program logic.   
 I think Timmy's comment is correct, keep the whole logic in a custom filter.