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]: At lunch a waiter had 7 customers and 4 of them did n't leave a tip . If he got $ 9 each from the ones who did tip , how much money did he earn ?
[A]: 27


[Q]: Dave was working as a sacker at a grocery store where he made 6 dollars an hour . On Monday he worked 6 hours and on Tuesday he worked 2 hours . How much money did Dave make in those two days ?
[A]: 48


[Q]: Maria had 14 bottles of water in her fridge . If she drank 8 of them and then bought 45 more , how many bottles would she have ?
[A]:
51