This is a simple division problem
80 bottles and each box holds 10 bottles, but how many boxes are there?
Well, we can just divide 80 by 10. How many times does 10 do into 80?
10 +10
20 +10
30 +10
40 +10
50 +10
60 +10
70 +10
80
If you count, that is 8 times. 10 goes into 80 8 times and this means that the student council has 8 boxes
Your answer is 8 boxes