Answer :
In this case you have to multiply to solve. So, you multiply the # of miles TIMES the number of hours. We know that the unit rate is 330 mph. So we multiply that with 12 hours. 12*330=3960.
By checking you must divide 3960 by 12. 3960/12=330
By checking you must divide 3960 by 12. 3960/12=330