http://www.maa.org/external_archive/devlin/devlin_01_11.html http://www.maa.org/external_archive/devlin/devlin_01_11.html this article January 2011 January 2011 this article http://www.maa.org/external_archive/devlin/devlin_01_11.html "What Exactly is Multiplication?" January 2011 "What Exactly is Multiplication?" January 2011 http://www.maa.org/external_archive/devlin/devlin_01_11.html http://www.maa.org/external_archive/devlin/devlin_01_11.html What Exactly is Multiplication? What Exactly is Multiplication? January 2011 January 2011 this article http://www.maa.org/external_archive/devlin/devlin_01_11.html