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: While taking inventory at her pastry shop , Kelly realizes that she had 0.4 box of baking powder yesterday , but the supply is now down to 0.3 box . How much more baking powder did Kelly have yesterday ?

A: 0.1
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Q: Mrs. Hilt bought an ice cream cone for 99 cents . How much would 2 ice cream cones cost ?

A: 198
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Q: 30 dogs are barking . 10 more dogs start to bark . How many dogs are barking ?

A:
40
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