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.

Input: Consider Input: Luke was selling his old games . He started out with 39 but sold 19 of them . He packed the rest up putting 4 games into each box . How many boxes did he have to use ?

Output: 5


Input: Consider Input: For Halloween Sarah received 66 pieces of candy from neighbors and 15 pieces from her older sister . If she only ate 9 pieces a day , how long would the candy last her ?

Output: 9


Input: Consider Input: A store had 27 coloring books in stock . They ended up putting them on sale and getting rid of 6 of them . The put the ones they still had onto shelves with 7 on each shelf . How many shelves did they use ?


Output: 3