%% 
%%  A DANTE-Edition example
%% 
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
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\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\usepackage[utf8]{inputenc}

\usepackage[exponent-product=\cdot]{siunitx}
\usepackage{booktabs}
\sisetup{table-alignment=center}

\begin{document}
\begin{tabular}{c
  S[table-format=1.3e1]<{{\,\si{\kilogram}}}
  S[table-format=2.2]}\toprule
\emph{no} & \multicolumn{1}{c}{\emph{mass}}
  & {mass/\SI{e3}{\kilogram}}\\\midrule
1 & 4.56e3  & 4.56  \\
2 & 2.40e3  & 2.40  \\
3 & 1.345e4 & 13.45 \\
4 & 4.5e2   & 0.45  \\\bottomrule
\end{tabular}
\end{document}
