A field that is a multiple of a float field. How? Let's say i have a product content type. It has a title, body and price field.

In a view (or in the node page) in addition to these fields I would like to have a multiple of the price field ?

Example : 


Title : Red tshirt 
Body : Tshirt description
Price : $9,95 
Extra field : $99,5 ( Price x 10 )
The easiest way would be to use the Computed Field module. Use something like:

if ( isset($entity-&gt;field_price)){
  $entity_field[0]['value'] = ($entity-&gt;field_price[0]['value'] * 10);
}


in the Computed Code (PHP) box.