That's why you use crafting guide mods. Seriously, you MUST install one to keep your sanity. I recommend [craftguide].
viewtopic.php?t=14088Minetest Game is still lacking a crafting guide which is an inexcusable failure IMO, as many subgames already have one: BFD, Carbone NG, Pixture, Lord of the Test, VoxBox, Minetest Hades, Minetest TNG, rpgtest, Regnum and VoxBox. I hope the developers will add one in the future.
The recipe which you just saw on the wiki was for the development version of Minetest Game and not 0.4.15. This has been recently changed by mistake. I have reverted this edit.
I was once a heavy wiki editor but I have stopped updating it for Minetest Game 0.4.15—mostly. For crafting recipes, a crafting guide is MUCH better anyways. For other help I created a modpack:
viewtopic.php?f=9&t=15912&p=240152