The transpose of a matrix is the result when you represent the columns as rows. The transpose of a matrix A can be represented as $ A^T $. For example,

$ \begin{bmatrix} 1 & 2 & 3\\ 0 & 5 & 10\\ 0 & 8 & 7\end{bmatrix}^T=\begin{bmatrix} 1 & 0 & 0\\ 2 & 5 & 8\\ 3 & 10 & 7\end{bmatrix} $