Goal and options: To remove the skin from a garlic clove,
output answer: place the clove on a cutting board, then place the flat side of a knife onto the clove and press down onto the side of the blade carefully until the clove pops out of its skin.

Goal and options: How to tie a Double Fisherman's Knot
output answer: Lay the ends of two lines parallel to each other. Coil the free end of one rope twice around the second rope and pass it back through the inside of the coils. Repeat with second rope in opposite direction

Goal and options: How do I smooth the iron bar ?
output answer:
Put the iron bar on a lathe, spin the iron bar. Start by passing a iron file on the spinning iron to smooth the bar, then use coarse (100 grit) sand paper on the spinning bar and finish by repeating the later but with a fine (400 grit) sandpaper.