Result: 1× Chiseled Red Sandstone
Chiseled Red Sandstone is a shaped crafting recipe that uses 2 items: 2 Red Sandstone 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. Because it fits into 2×2 slots, you can craft it directly in your inventory — no crafting table needed.
Read the Chiseled Red Sandstone article in our Minecraft wiki
You need 2 Red Sandstone Slab — 2 items in total, arranged as shown in the crafting grid. The recipe gives you 1× Chiseled Red Sandstone.
No. The recipe fits into 2×2 slots, so you can craft it in your inventory's crafting grid. A crafting table works as well.
It is a shaped recipe: the arrangement matters. You can shift the pattern around the grid, but the shape must stay the same.
Chiseled Red Sandstone is an ingredient in 2 crafting recipes, for example Red Sandstone Slab and Red Sandstone Stairs.