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:
63 people are going to the zoo . there are 3 cars to take people to the zoo . how many will go in each car if the same number go in each car ?

Ex Output:
21


Ex Input:
our watermelons have 100 seeds each . if we have 4 watermelons how many seeds should there be when all seeds are taken out of the watermelons ?

Ex Output:
400


Ex Input:
a mailman has to give 28 pieces of junk mail to each block . if there are 4 houses on a block how many pieces of junk mail should he give each house ?

Ex Output:

7