Perform multiplication of positive integers by the lattice method and the lattice construction along with the solution will be completed for you.
Select the size of the lattice you want and click on the "Create Worksheet" button.
Lattice method of multiplication to show 327 × 586 = 191,622

http://www.coolmath4kids.com/times-tables/times-tables-lesson-lattice-multiplication-1.html
http://mathworld.wolfram.com/LatticeMethod.html
http://en.wikipedia.org/wiki/Multiplication_algorithm#Lattice_multiplication