Detailed Instructions: You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
Problem:on the actual day of annie 's birthday almost everyone in her class came to surprise her . if annie has 15 girl classmates 20 boy classmates and 3 teachers in her class how many people attended her birthday party ?
Solution:
38