"Mike operates on a machine which produces a widget every six seconds. He starts work at 8:00AM, takes a half an hour off for lunch, and stops working at 4:00PM. How many widgets does he produce each day?"

Think it through.

How much time does he put in at work in hours?

How many seconds is that?

Start by finding how many seconds are in one hour, then multiply that result by 7.5,
Divide that result by 6.