\[\LARGE \begin{array} { l l l l l }

\square & + & \square & = & \square \\
+ & & \times & & \\
\square & \div & \square & = & \square \\

\hspace{1mm} {\small ||} & & \hspace{1mm} {\small ||} & & \\
\square & & \square \\
\end{array} \]

Fill in the 8 boxes with distinct digits, such that all 4 equations are true.

Clearly, we cannot use the digit 0. What other digit is not used?

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