\documentclass[a4paper]{article}
\usepackage{german}
\usepackage[utf8]{inputenc}

\usepackage{pgfplots}

\usepackage{pgfplotstable}
\usepackage{booktabs}
\usepackage{array}
\usepackage{colortbl}

\begin{document}

\begin{tikzpicture}
	\begin{axis}[axis equal,xlabel=x,ylabel=y,zlabel=z,domain=0:1,view={0}{90}]
	\addplot3[surf,samples=3] {x*y};	
	\end{axis}
\end{tikzpicture}
\end{document}

