Price calculator for Opencart 3 (ceramic tiles)

You need to create a calculator ceramic tile with addiction:

number of pieces = how many m2 = how much of the packaging.

The price may initially be as per unit, and per square meter. Data for calculations can be taken from attributes.

It is necessary to envisage that this functionality will only work in categories and podkategorie Ceramic tiles.

The functionality is the same as on this website https://kit.by/plitka/plitka-dlya-gostinnoy/keramin-karrara-1-50x50/

In a basket of leaves number of pieces (as default) duplication in square meters.