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.

Example Input: There is 0.16666666666666666 cup of oil in Scarlett 's measuring cup . If Scarlett adds 0.6666666666666666 cup more , how much oil will be in the measuring cup ?
Example Output: 0.8333333333333334

Example 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 ?
Example Output: 2

Example Input: A pet store had 36 siamese cats and 18 house cats . During a sale they sold 26 cats . How many cats do they have left ?
Example Output:
28