How would you use a calculator to do long divisin

You can't.  BUT ... When you have a calculator, you
don't need to do long division !

Long division is a step-by-step method for doing division on paper
with a pencil.  With a calculator, you just tap in the numbers, hit
the ' ÷ ' button, and bada-bing, there's the answer !

Are you thinking that if you don't do it a certain way
then you won't get the right answer.  Don't worry !
The answer you get DOES NOT DEPEND on how
you calculate it.  The correct answer is the correct
answer.  Whatever method you choose, if you do it
correctly, you always get the same answer.

Another way to say it:  When you look at somebody's
correct answer, there's NO WAY TO TELL what method
he used to find it.  All methods, if applied correctly, give
the same answer.