You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are given a math word problem and you are supposed to only use multiplication or division operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Context: Alex has 5 boxes, each box has 4 apples.

 Question: How many apples does Alex have ?
Solution: 20
Why? Total number of apples is 5*4 = 20

New input: Context: Robin has 21 packages of gum and 45 packages of candy. There are 9 pieces in each package. 

 Question: How many pieces of candies does Robin have?
Solution:
405