Can you give me some step-by-step instructions for this math problem: Vince can staple 30 reports every 15 minutes.  If he was stapling reports from 8:00 AM until 11:00 PM, how many reports did he staple altogether?
In one hour, there are 60 / 15 = 4 (15 minutes).
From 8am - 11am, there are 11 - 8 = 3 hours.
In 3 hours, there are 3 x 4 = 12 (15 minutes).
In those 3 hours, Vince stapled 12 x 30 = 360 reports.