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

[Q]: Beth has 4 packs of crayons . Each pack has 10 crayons in it . She also has 6 extra crayons . How many crayons does Beth have altogether ?
[A]: 40

[Q]: A worksheet had 4 problems on it . If a teacher had 9 worksheets to grade and had already graded 5 of them , how many more problems does she have to grade ?
[A]: 16

[Q]: Mark 's father gave him $ 85 . Mark bought 10 books , each of which cost $ 5 . How much money does Mark have left ?
[A]:
35