Custom Calculator to Calculate Metres Squared on Magento 2 Product Page

We are putting together a tile company, and sell tiles individually. Each tile is the equivalent of a certain metre squared.

We need a calculator to sit on the product page (displayed conditionally based on type of product) and calculate the number of tiles required for a given width and length.

See working examples here:

https://totaltiles.co.uk/calacatta-white-marble-effect-porcelain-floor-tile-600x600.html

and here:

https://www.tiles-direct.com/non-slip-floor-tiles-c1/dakota-dark-grey-60cm-x-60cm-x-2cm-outdoor-floor-tile-p2988

We are on Magento 2.2.3

More info available on request.