\documentclass[a4paper]{article} \usepackage{german,amsmath,amsfonts} \begin{document} $$m = 5,n = 6,s = 4$$$$\left(\begin{array}{ccccccc}7&5&2&9&5&0&\\ 4&8&5&9&2&4&\\ 3&2&2&8&7&0&\\ 8&3&9&2&2&6&\\ 3&6&2&5&1&6&\\ \end{array}\right)\left(\begin{array}{ccccc}3&8&1&5&\\ 8&8&7&4&\\ 6&3&3&0&\\ 7&6&2&1&\\ 7&1&2&5&\\ 4&3&7&6&\\ \end{array}\right) = \left(\begin{array}{ccccc}171&161&76&89&\\ 199&179&125&95&\\ 142&101&53&66&\\ 154&147&106&100&\\ 135&127&105&85&\\ \end{array}\right)$$ \end{document}