Jill likes to watch shows on her favorite streaming service.  She watched a show that was 30 minutes long, and then watched another show that was 4 times longer.  How many total minutes did she spend watching shows?
Jill watched one show that was 4 times longer than 30 minutes, so it was 4*30=<T>multiply(4, 30)=120 minutes long.
Jill also watched another show that was 30 minutes long, so the total time Jill spent was 120+30=<T>add(120, 30)=150 minutes
