$\"\"$

The product of the matrix $\"\"$ dimension has $\"\"$ .

Then $\"\"$ has dimension has $\"\"$ .

Find $\"\"$ dimensions.

The number of columns in the matrix $\"\"$ equals the number of rows in the matrix $\"\"$ .

So, matrix product $\"\"$ is possible.

$\"\"$ dimension has $\"\"$ and $\"\"$ dimensions are $\"\"$ .

$\"\"$

$\"\"$ dimension has $\"\"$ .