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

Input: Consider Input: At the hardware store , 0.25 the nails are size 2d and 0.5 the nails are size 4d . What fraction of the nails are either size 2d or 4d ?

Output: 0.75


Input: Consider Input: Debby 's class is going on a field trip to the zoo . If each van can hold 4 people and there are 2 students and 6 adults going , how many vans will they need ?

Output: 2


Input: Consider Input: George had 30 dollars . For his birthday he got 16 more dollars but spent 38 on a new game . How much money does he have now ?


Output: 8