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.
--------
Question: Paul made 68 dollars mowing lawns and 13 dollars weed eating . If he only spent 9 dollar a week , how long would the money last him ?

Answer: 9

Question: 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 ?

Answer: 60

Question: 2 birds were sitting on the fence . 4 more birds came to join them . How many birds are sitting on the fence ?

Answer:
6