TASK DEFINITION: In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 
PROBLEM: How can I figure out if something is economical?

SOLUTION: Look up its effect on your wallet, as well as the nessary materials to build it.

PROBLEM: What is a cheap way to make a mold for plastic blocks.

SOLUTION: Construct a box from scrap wood and line it with baking paper.

PROBLEM: how do you turn off a light?

SOLUTION:
flip the switch downward.