Given the task definition and input, reply with output. 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.

kale mowed his lawn 8 times total during the spring . if he mowed it 5 times in the summer . what 's the difference between the number of times on mowing in the spring and summer ?
3