Hello!
To find the answer, you'll first need to find how many gears that can be made in a hour. You can do this by dividing 2088 by 8. Once you've done that, there will be 261 gears being made every hour. Now you'll need to multiply 261 by 9 to see how many gears will be made n 9 hours. Once you've done that, you'll have your answer.
In 9 hours, there are 2349 gears that are made
I hope this helps!