Prestashop module edited - price caluclated per total area; Capture information from fields and save them to #order details page

Basically, I have the following website: [login to view URL] I have a module that I use as a calculator: [login to view URL] I need several changes on the product page. Example product page: [login to view URL] What I need to be done: 1)Price to be calculated by Total Area. (Right now the Total area field updates the quantity field and adds 1 product per 1 m2. Currently example of how it is working -> height: 50 cm width: 50 cm = 250 cm = 2.5m - product quantity is rounded and updated to 3. Price = PRODUCT PRICEx3 How I need it to be working: Product quantity should remain the same and not be updated automatically by the module - clients will still have the possibility to update the product quantity. Price should be calculated by Total Area. In case clients add quantity 2 - price goes up x2 ; quantity 3 - price goes up x3... Example: Product cost 5$ per m2-> Clients total area is 7m2 => Product price would be 35$ Clients update product quantity x4 => 35x4 = 140$ There are 2 fields on the product page: Height and Width - where customers add the height and width I need this information recorded and added to the product # order page in the admin panel - page where I see information about the order.