square matrices multiplying square matrices is often used in computer graphics. In 3-D it is common for these matrices to be 4 by 4 square. The procedure is about the same as the multiplications with rows/columns and square matrices except that in this procedure the answer will be a square matrix with the same number of columns and rows as the originals. So a 4X4 square matrix times a 4X4 square matrix will result in a 4X4 square matrix. The example below shows how the elements of each row from the left square is multiplied by the columns of the right square. Each of these row-column multiplications results in a single element located in the answer matrix at the same place where the row/column being multiplied cross. So, for example, the first row times the first column results in an element in the first row/first column of the resulting matrix.The first row times the second column results in an element in the first row/2nd column of the answer matrix. etc.