9 goes into 5, 0 times
9 goes into 52, 5 times
after subtracting 52 from 45 you should have 7 as your difference
now bring down the 2
9 goes into 72 evenly, 8 times.
So your answer should be 58.
To check:
9 * 58:
9 * 8 is 72 carry the 7 over the 5
9 * 5 is 45, plus 7 is 52
Which gives you the answer of 522, the number you started out with.
