Result: 1× Barrel
Barrel is a shaped crafting recipe that uses 8 items: 6 Any Planks and 2 Any Wooden Slab. Place the ingredients exactly in the pattern shown above. The pattern can sit anywhere on the grid as long as its shape stays the same. It needs the full 3×3 grid, so you have to use a crafting table. "Any Planks" means any of 13 kinds: Oak Planks, Spruce Planks, Birch Planks, Jungle Planks …
You need 6 Any Planks and 2 Any Wooden Slab — 8 items in total, arranged as shown in the crafting grid. The recipe gives you 1× Barrel.
Yes. The recipe needs the full 3×3 grid, which only a crafting table offers.
It is a shaped recipe: the arrangement matters. You can shift the pattern around the grid, but the shape must stay the same.
Yes. "Any Planks" means any of 13 kinds: Oak Planks, Spruce Planks, Birch Planks, Jungle Planks …