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 Q]: You have collected 7 crickets . How many more crickets do you need to collect to have 11 crickets ?
[EX A]: 4

[EX Q]: John needs $ 2.5 . He has $ 0.75 . How much more money does he need ?
[EX A]: 1.75

[EX Q]: Ellen had 380 legos , but Ellen lost 57 of them . How many legos does Ellen have now ?
[EX A]:
323