Answer:
16 * 15 = 240 * 25 = 6000
Step-by step explanation
I think what you would do is 16 multiplied by 15 to get how much money 1 student made (16 * 15 = 240). Then you would do 240 multiplied by 25 to get how much all of the students made (240 * 25 = 6000).
hope this helps :)