[1.7.10] Using more than one of the same item for shapeless crafting

[DerpyHoovesMC]

Hi, I've been fiddling around with shapeless crafting and I am wondering if it is possible to use more than 1 of the same item to create something

Example: Use 4 coal to make coal chunk

 

Do I need a shaped recipe for this?

 

Thanks in advance!

[DerpyHoovesMC]

How would I go about doing it?

 

This is my code now:

 

GameRegistry.addShapelessRecipe(new ItemStack(CondensedCoalChunk), [b]new ItemStack(LargeCoalChunk, 4)[/b], new ItemStack(Transformer, 1, OreDictionary.WILDCARD_VALUE));

 

The bolded is what I want to put 4 of it in a square

[DerpyHoovesMC]

Ok thanks!