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.
Example: For the school bake sale Bianca made 14 cupcakes . If she sold 6 of them and then made 17 more , how many cupcakes would she have ?
Example solution: 25
Example explanation: Total cupcakes she would have = baked - sold = 14 -6 + 17 = 25 

Problem: Debby 's class is going on a field trip to the zoo . If each van can hold 4 people and there are 2 students and 6 adults going , how many vans will they need ?

Solution: 2