Ok so first
4,500/9 ( / división sign)
Second
What can you get bye 45 ?
So you can do 9x5=45
Third
What can get you 0
Which is 0
So far you have
4,500/9 =50
Then what gets you 0 which is 0 so it equals
=500
To check your work
You can do
500 x 9
= 4500