human
At a bus station, a bus leaves every half-hour for 12 hours a day. How many buses leave the station for 5 days?
assistant
How many buses leave the station in one hour? ** If one bus leaves every half-hour, then during one hour, there are 1 + 1 = <<1+1=2>>2 buses that leave the station.
How many buses leave the station for 5 days? ** During 5 days 2 * 12 * 5 = 120 buses leave the station.
#### 120