instruction:
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:
Milford Lake was originally blue because it only had 809 algae plants . Now there are 3263 algae plants , and the lake has turned green . How many more algae plants are in Milford Lake now ?
answer:
2454

question:
Luke was putting his spare change into piles . He had 5 piles of quarters and 5 piles of dimes . If each pile had 3 coins in it , how many coins did he have total ?
answer:
30

question:
A toy store had 17 giant stuffed bears in stock when they got another shipment with 10 bears in it . The put the bears onto shelves with 9 on each shelf . How many shelves did they use ?
answer:
3