You will be given a definition of a task first, then some input of the task.
You are given a math word problem and you are supposed to apply division mathematical operator on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Context: White t - shirts can be purchased in packages of 13. If mom buys 39 white t - shirts 

 Question: How many packages will she have?
Output:
3