Calculate the formula according to the meaning of the question:

480÷24

=48x 10÷24

=2x 10

=20

So each class can be divided into 20 volumes on average.

Law of integer division:

1) Start with the high order of the dividend, first look at how many digits there are in the dividend, and then try to divide the dividend by the first few digits. If it is less than the divisor, try dividing it by one digit.

2) Write the quotient except the dividend on the dividend.

3) The remainder after each division operation must be less than the divisor.