You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Ex Input:
Ron weighed 2 colored metal balls during a science class . The blue ball weighed 6 pounds and the brown ball weighed 3.12 pounds . If Ron places both balls on the scale at the same time , what will the scale read ?

Ex Output:
9.12


Ex Input:
There were 8 friends playing a video game online when 2 more players joined the game . If each player had 6 lives , how many lives did they have total ?

Ex Output:
60


Ex Input:
Vanessa and her friends were recycling paper for their class . For every 9 pounds they recycled they earned one point . If Vanessa recycled 20 pounds and her friends recycled 16 pounds , how many points did they earn ?

Ex Output:

4