You are given a math word problem and you are supposed to apply a single mathematical operator 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:
when the building is done they wanted to make it shine brightly in the night . to fix that they commissioned 432 fireflies and 297 glow worms . how many animals worked in the lights ?

Ex Output:
729

Ex Input:
the store has cd 's and dvd 's that you need . how many packs of dvd 's can you buy with 132 dollars if 1 pack costs 12 dollars ?

Ex Output:
11

Ex Input:
cindy and dan have the same number of stickers . cindy used 15 of her stickers . dan bought 18 more stickers . how many more stickers did dan have than cindy then ?

Ex Output:
33