Show question and answer for all division problems

Summary: Making all the division exercises consistent with each other and the multiplication exercises. Showing the question first before the long division set-up for students not familiar with long division notation (which is different in some countries) and so students can choose by what method they solve the question.

Test Plan: Make sure all these questions look OK and the hints still work.

Reviewers: eater, emily

Reviewed By: emily

Differential Revision: http://phabricator.khanacademy.org/D13419