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]: Megan 's class is going on a field trip to the zoo . If each van can hold 5 people and there are 25 students and 5 adults going , how many vans will they need ?
[EX A]: 6

[EX Q]: A tennis racket that regularly sells for 135 dollars is on sale for 25 % off the regular price . What is the sale price , in dollars ?
[EX A]: 101.25

[EX Q]: In fourth grade there were 4 students at the start of the year . During the year 3 students left and 42 new students came to school . How many students were in fourth grade at the end ?
[EX A]:
43