How do you do long division?
Since it cannot be explained in a few sentences (sorry, it really can't be), here are some resources for reference instead:
Long division (Wikipedia)
Long division (Wolfram Alpha)
Long division (Math is fun)
Long division (Math Antics' video)
Long division (TheAnimatedClassroom's video)
Really Easy. You just divide for many hours without rest. Thats "Long Division".