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.

[Q]: Mike made 42 dollars mowing lawns over the summer . If he spent 10 dollars buying new mower blades , how many 8 dollar games could he buy with the money he had left ?
[A]: 4


[Q]: There were 16 friends playing a video game online when 7 players quit . If each player left had 8 lives , how many lives did they have total ?
[A]: 72


[Q]: On a recent trip to CA , we averaged 50 miles per hour . On the return trip we averaged 60 miles per hour . Determine the average speed of the trip to CA and back .
[A]:
54.545