$$\mathrm{一个}\otimes B＝［\begin{array}{ccc}\begin{array}{cc}{\mathrm{一个}}_{11}B& {\mathrm{一个}}_{12}B\end{array}& \cdots & {\mathrm{一个}}_{1n}B\\ \begin{array}{cc}\begin{array}{c}{\mathrm{一个}}_{21}B\\ ⋮\end{array}& \begin{array}{c}{\mathrm{一个}}_{22}B\\ ⋮\end{array}\end{array}& \begin{array}{c}\cdots \\ \ddots \end{array}& \begin{array}{c}{\mathrm{一个}}_{2n}B\\ ⋮\end{array}\\ \begin{array}{cc}{\mathrm{一个}}_{米1}B& {\mathrm{一个}}_{米2}B\end{array}& \cdots & {\mathrm{一个}}_{米n}B\end{array}］．$$

$$\begin{array}{l}\mathrm{一个}＝［\begin{array}{cc}1& -2\\ -1& 0\end{array}］，B＝［\begin{array}{cc}4& -3.\\ 2& 3.\end{array}］\\ \\ \mathrm{一个}\otimes B＝［\begin{array}{cccc}1·4& 1·-3.& -2·4& -2·-3.\\ 1·2& 1·3.& -2·2& -2·3.\\ -1·4& -1·-3.& 0·4& 0·-3.\\ -1·2& -1·3.& 0·2& 0·3.\end{array}］＝［\begin{array}{cccc}4& -3.& -8& 6\\ 2& 3.& -4& -6\\ -4& 3.& 0& 0\\ -2& -3.& 0& 0\end{array}］．\end{array}$$