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

Input: Consider Input: sharon has 7 plums . allan has 10 plums . what 's the difference of the number of sharon 's plums and allan 's plums ?

Output: 3

Input: Consider Input: marian 's friends were coming over that afternoon so she made 480 bite-sized pretzels . if 1 serving is equal to 12 pretzels how many servings of bite-sized pretzels was marian able to prepare ?

Output: 40

Input: Consider Input: the tallest giraffe at the zoo is 96 inches tall . there are 14 adult giraffes at the zoo . the shortest giraffe is 68 inches . how much taller is the bigger giraffe ?
Output: 28