Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2xy/ Esercizi: http://www.khanacademy.org/exercises?exid=multiplication_3 Traduzione in Italiano del video Lattice Multiplication http://www.youtube.com/watch?v=gS6TfWUv97I http://www.khanacademy.org/video/lattice-multiplication?playlist=Arithmetic Help us caption & translate this video! http://amara.org/v/B2xy/