In how many ways can a music teachet arrange 24 students in 3 rows

I think to get the answer you would multiply each of the digits by each other. 
24 x 3 = 72

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,