You are given a math word problem and you are supposed to apply multiplication or division mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Ex Input:
David had 4000 dollars invested for 0.25 of a year at a simple rate of 6.1 % . How much interest did he earn ?

Ex Output:
61

Ex Input:
There are 8 marbles in each box . How many marbles are in 6 boxes ?

Ex Output:
48

Ex Input:
Soft drinks are on sale at the grocery store for 2.99 dollars for a 12 pack . How much would each can of soft drink cost if purchased individually , in dollars ?

Ex Output:
0.25