Ok so to get this achievement you'll need the following: 15 iron ingots, 12 logs (any works) and 8 stone. So first turn the logs into planks and make six chests. With three of the chests you made make 3 hoppers using the 15 iron ingots. Make a furnace with the 8 stone and then place it where there's room for other blocks. First, put the hoppers around the chest like .'. and make sure they're connected to the furnace. Second put chests on top of the hoppers. Lastly, wait for the achievement to pop up. I hope this helps and there are other ways to set the hoppers and if this didn't help feel free to just google how.