How to set up the sale of not the quantity of goods but meters?

Question

WordPress

There is a website that sells fabrics by the cut in meters, there is also a plugin for calculating the delivery of SDEK. When adding to the cart, let's say 8 meters of fabric, where 1 meter weighs 0.2kg, woocommerce considers them not as 8 meters weighing 1.6kg, but as 8 items of 0.2kg each, because of this, the plugin displays the delivery amount of eight separate items, then the network is 330r (delivery cost of one item) multiplied by 8. It would be correct to assume that we have 8 meters multiplied by 0.2 and this will be one item weighing 1.6 kg. Who knows how to implement this? Maybe there is a plugin?