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

Ex Input:
A tailor cut 0.75 inch off a skirt and 0.5 inch off a pair of pants . How much more did the tailor cut off the skirt than the pants ?

Ex Output:
0.25

Ex Input:
It took Katherine 3 hours to run to Louis 's house at 8 miles per hour . How far is it between Katherine 's house and Louis 's house ?

Ex Output:
24

Ex Input:
A car traveled 715 kilometers in 11 hours . What was its average speed ?

Ex Output:
65