Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.

Let me give you an example: robin bought 11 sodas for her and her friends . if they only drank 3 of them how many extras did she have ?
The answer to this example can be: 8
Here is why: Extra sodas is total - drank = 11-3 = 8

OK. solve this:
maria had 67 pieces of candy . she ate 64 pieces . how many pieces of candy does maria have now ?
Answer:
3