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]: A new building needed 9 windows . The builder had already installed 6 of them . If it takes 6 hours to install each window , how long will it take him to install the rest ?
[A]: 18

[Q]: 5 boats are in the lake . Each boat has 3 people . How many people are on boats in the lake ?
[A]: 15

[Q]: Sue ' s mother made 75 cookies . She put the cookies in bags , with 3 cookies in each bag . How many bags could she fill up ?
[A]:
25