Calculate in two ways by applying the associative law of multiplication, which says: The product of three or more factors does not change if the product of the first two is multiplied by the last factor or if the product of the second and third is multiplied by the first factor.
Our school has 
floors. There are 
classrooms on each floor and 
desks in each classroom. How many desks are there in all the classrooms of our school?
desks.
