Block Matrix Multiplication A*B can be achieved – Step by Step – using the Matrix Made Easy app at www.TiNspireApps.com as follows:
Select the Block Matrix Multiplication in the MENU :
Next enter Matrices A, B and the dimensions of the 2 top left Matrices A11 and B11 which determines how A and B are partitioned:
Continue scrolling down to view the partitioned Matrices A11,A12,A21,A22 and B11,B12,B21,B22 and their multiplications.
Putting together the partial results we finally find the Multiplication Matrix result A*B :