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. 

How can I figure out if something is economical?
Look up its effect on your wallet, as well as the nessary materials to build it.

pick
can mine in the dark using a  flashlight 

how do you add more memory to an android phone?

open up the sd card slot on the side of the phone, and place an sd card on the tray that pops out, then push it in the phone and close the slot.