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

[Q]: 2 stockbrokers are making cold calls to potential customers regarding a hot IPO . One of the brokers is able to get a new client every 0.125 hour , and the other is able to get a new client every 0.2 hour . At what rate , in clients per hour , are the new clients being acquired when both are working ?
[A]: 13

[Q]: Edward and his friend were buying trick decks from the magic shop for 6 dollars each . How much did they spend if Edward bought 3 decks and his friend bought 6 decks ?
[A]: 54

[Q]: Mike invited 13 friends to a birthday party , but 7 could n't come . If he wanted to buy enough cupcakes so each person could have exactly 4 , how many should he buy ?
[A]:
24