![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Multiplication of two matrices possible if the number of columns in the
\first matrix equals the number of rows in the second matrix.
\The dimensions of the matrix R are ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=be9e009cd45d3524ff35346d2c50a40f.png\")
and the number of columns in the matrix R is 2.
The dimensions of the matrix S are ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3883f3965eae856b25be0ab2ed65cfbb.png\")
and the number of the rows in the matrix S is 2.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
The number of columns in the matrix R equals the number of rows in the matrix S.
\So, matrix product RS is possible. Its dimensions are ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=61edd4f307a549181356d482d5aaf219.png\")
.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4706e5f96a26b1f884b5b870bfd954b5.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The matrix product RS is defined and matrix RS dimensions are .