\tikzstyle{num} = [minimum width = 0.6cm,minimum height = 0.6cm,draw,fill=green!20]
\begin{tikzpicture}[node distance = 0]

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\node[num] at (0.6,0){1};
\node[num] at (1.2,0){2};
\node[num] at (1.8,0){0};
\node[num] at (2.4,0){2};
\node[num] at (3,0){2};

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%\fill (4,1.5) circle (2pt);
\node [] at (4,1.5) {*};

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\node[num] at (6.2,2.1){1};

\draw (7.5,1.5)node{$=$};


\node[num] at (9,0.6){8};
\node[num] at (9.6,0.6){7};
\node[num] at (10.2,0.6){2};
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\node[minimum width = 0.6cm,minimum height = 0.6cm,draw=purple!40,line width=0.08cm,fill=purple!40,fill opacity=0.4] at (9,2.4) {};

\node[] (in) at (1.5,-1) {\small{输入：6$\times$6}};
\node[] at (5.7,-1) {\small{卷积核：3$\times$3}};
\node[] (out) at (10,-1) {\small{输出：4$\times$4}};

%\node[font=\footnotesize,dashed,draw=teal,very thick,fill=green!5,align=center] at ([yshift=3cm,xshift=1.5cm]out.east) {*\ \ ：表示\\卷积计算};
\node[] at ([yshift=-0.3cm,xshift=-2.3cm]in.east) {\ \ \ \ \ };

\end{tikzpicture}