Detailed Instructions: 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.
Problem:christmas came and as usual she received 77 gifts to put under the christmas tree . she wanted to make other kids happy so she sent 66 of her gifts to the orphanage downtown . how many gifts were left under their christmas tree ?
Solution:
11