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:
Fred found 47 seashells on the beach , he gave Jessica 25 of the seashells . How many seashells does he now have ?

Ex Output:
22


Ex Input:
Megan 's class is going on a field trip to the zoo . If each van can hold 5 people and there are 25 students and 5 adults going , how many vans will they need ?

Ex Output:
6


Ex Input:
Vince 's bus ride to school is 0.625 mile and Zachary 's bus ride is 0.5 mile . How much longer is Vince 's bus ride than Zachary 's ?

Ex Output:

0.125


