Question 616236
Draw out the picture of the floorplan to get


<img src="http://i150.photobucket.com/albums/s91/jim_thompson5910/Algebra%20dot%20com/pic1.png">


You can place 9/3 = 3 containers along the length and 6/3 = 2 containers along the width. So we get 3*2 = <font color="red">6 containers</font> total as shown below



<img src="http://i150.photobucket.com/albums/s91/jim_thompson5910/Algebra%20dot%20com/pic2.png">