\documentclass[varwidth=true, border=2pt]{standalone}
\usepackage{tikz}
\usepackage{pgfplots}

\begin{document}
\begin{tikzpicture}[thick]
    \draw (-1,-1) -- (1,-1) -- (1,1) -- (-1,1) -- cycle;
    \draw (0cm,0cm) circle(0.9cm);

    \begin{scope}[scale=1.7]
        \draw (-1,-1) -- (1,-1) -- (1,1) -- (-1,1) -- cycle;
        \draw (0cm,0cm) circle(0.9cm);
    \end{scope}
\end{tikzpicture}
\end{document}