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.

Ex Input:
gwen was organizing her book case making sure each of the shelves had exactly 4 books on it . if she had 5 shelves of mystery books and 3 shelves of picture books how many books did she have total ?

Ex Output:
32


Ex Input:
warren has 252 guests coming to his party . each table will hold 4 guests . how many tables will he need ?

Ex Output:
63


Ex Input:
when he arrived there he went on to climb to the top of the falls . it usually takes 30 minutes for someone to get to the top . stanley took time to see the view so his climb took 7 times longer than the usual . how many minutes did it take stanley to get to the top ?

Ex Output:

210