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:
Jason joined his school 's band . He bought a flute for $ 142.46 , a music tool for $ 8.89 , and a song book for $ 7 . How much did Jason spend at the music store ?

Ex Output:
158.35


Ex Input:
Roger is at the library helping put away books . There are 14 book to put away total but a librarian takes 2 of them and leaves Roger with the rest . If he can fit 3 books on a shelf , how many shelves will he need ?

Ex Output:
4


Ex Input:
A waiter had 19 customers to wait on . If 14 customers left and he got another 36 customers , how many customers would he have ?

Ex Output:

41