instrumental vs. essential

would you take a calculator 
and spend the rest of your life 
multiplying two by two?

from four to eight to you know where 
working the keys to bring the screen 
to the highest ever, a winner 

your purpose might confuse a wise child 
even if why meant a renumeration 

could you pay for a life with your fingertips 
if you can only use your digits 
after you've gone cold?