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.

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

Alyssa bought some toys . She bought a football for $ 5.71 , and spent $ 6.59 on marbles . In total , how much did Alyssa spend on toys ?
12.3

David has 7 boxes of stuffed toy dogs . Each box has 4 dogs in it . How many dogs are there in all ?

28