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.

63 people are going to the zoo . there are 3 cars to take people to the zoo . how many will go in each car if the same number go in each car ?
21

billy was making ice using ice trays . each tray held 9 ice cubes . if he had 8 trays how many cubes could he make ?
72

for halloween tom received 20 pieces of candy . if he put them into piles with 5 in each pile how many piles could he make ?

4