Hi, I created a livestock mod.
From the animal you can now get raw meat,
But I want to add the opportunity to get the skin from this animal when cutting carcasses.
I understand how to make 2 elements in the input.
But there are problems with the release of products (I did not find in the game machines with two production releases)
Tell me how can I implement it?

I looked at all the built-in functionalities (BF_LIGHT,BF_ITEM_FURNACE,BF_CRAFTING etc.) but could not find the functionality satisfying me (2 production outputs).
I tried to figure out where these functions are stored in the game folder, so that I could try to implement a similar one, but I also could not find them in the game files.