It takes two hours to paint the walls of a room. If there are seven such rooms,
how many degrees in total will the hour hand move by the time all the rooms
have been painted?
Note: All the rooms are of the same size, and they are painted one after the
other not simultaneously.

1. 420 degrees clockwise
2. 390 degrees clockwise
3. 450 degrees clockwise
4. 480 degrees clockwise