The question is asking how many routes Cassidy can take from home to the post office to the bank.
There are four routes from home to the post office.
Then two from the post office to the bank.
We need to find ALL the different ways we can get from home to the post office to the bank.
4*2= 8
There are 8 possible routes for Cassidy to take from home to the post office to the bank.
I hope this helps!
~kaikers