Goal and options: How can I clean my tub with a homemade cleaner?
output answer: Make a bathtub cleaner paste of one part hydrogen peroxide to two parts baking soda (or cream of tartar). Rub the paste on the stain and let stand for 30 minutes to one hour, then wipe and rinse. If necessary, repeat until the stain is gone.

Goal and options: To locate studs in a wall,
output answer: you need to gently knock on the wall looking for a sturdy sound rather than a hollow sound.

Goal and options: Peel an orange.
output answer:
Using a knife, score the circumference of the orange in a straight line to a depth of just below the peel. Score another straight line perpendicular to the first line. Using your fingers, remove each of the four sections of the peel.