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

Q: Shannon and her family use up a lot of strawberry and blueberry jelly , since they eat toast every morning . At the moment , they have a combined total of 6310 grams of jelly . If they have 4518 grams of blueberry jelly , how many grams of strawberry jelly do they have ?

A: 1792
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Q: There are 3 short trees and 6 tall trees currently in the park . Park workers will plant 9 short trees today . How many short trees will the park have when the workers are finished ?

A: 12
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Q: There are 9 cards . 4 cards more are added . How many are there total ?

A:
13
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