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.

[Q]: Sara picked 35 pears and 27 apples from the orchard . She gave 28 pears to Dan . How many pears does Sara have ?
[A]: 7

[Q]: 63 people are going to the zoo . There are 3 cars to take people to the zoo . How many will go in each car if the same number go in each car ?
[A]: 21

[Q]: John walks 0.7 miles to school and Nina walks 0.4 miles to school . How much farther does John walk than Nina ?
[A]:
0.3