You are given a math word problem and you are supposed to apply a single mathematical operator 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.
--------
Question: the wildcats scored 36 points in the first half of the game . the panthers scored 17 points . how many more points did the wildcats score ?

Answer: 19

Question: there are 397 butterflies . each butterfly has 12 black dots and 17 yellow dots . how many black dots are there in all ?

Answer: 4764

Question: there were 22 bales of hay in the barn . keith stacked more bales in the barn today . there are now 89 bales of hay in the barn . how many bales did he store in the barn ?

Answer:
67