You are given a math word problem and you are supposed to apply multiple mathematical operators 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.

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

[EX Q]: the school is planning a field trip . the school has 11 classrooms . there are 100 students in the school and 20 seats on each school bus . how many buses are needed to take the trip ?
[EX A]: 5

[EX Q]: isabel received 14 dollars for her birthday . later she found some toys that cost 2 dollars each . how many of the toys could she buy ?
[EX A]:
7