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:
before they end the meeting tom counted the total number of robots in his collection . he has 6 sets of robots and each set is composed of 7 robots . how many robots does tom have in his collection ?

Ex Output:
42

Ex Input:
a pile of clean white paper was stacked in the corner of her room . she decided to place these papers in paper envelopes which can contain 10 white papers . how many paper envelopes does she need if she has 120 clean white papers ?

Ex Output:
12

Ex Input:
janet was practicing for a marathon . she practiced for 9 days running 8 miles each day . how many miles did janet run altogether ?

Ex Output:
72