% \documentclass{article}
% \usepackage{fancyhdr}
% \pagestyle{fancy} 
% \newcommand{\frontmatter}{\clearpage \cfoot{\thepage\ }
% \setcounter{page}{1}
% \pagenumbering{Roman}}
% \newcommand{\mainmatter}{\clearpage \cfoot{\thepage\ of \pageref{LastPage}}
% \setcounter{page}{1}
% \pagenumbering{arabic}}
% \newcommand{\backmatter}{\clearpage \cfoot{\thepage\ }
% \setcounter{page}{1}
% \pagenumbering{alph}}

% \begin{document}
% \frontmatter
%     The last page is \pageref{LastPageOfFrontMatter}.
%     \newpage ... \newpage  ... \newpage
%     on the last page of frontmatter
%     \label{LastPageOfFrontMatter}~
% \mainmatter
%     The last page is \pageref{LastPage}.
%     \newpage ... \newpage  ... \newpage
%     on the last page of mainmatter
%     \label{LastPage}~
% \backmatter 
%     The last page is \pageref{LastPageOfBackMatter}.
%     \newpage ... \newpage  ... \newpage
%     on the last page of backmatter
%  \label{LastPageOfBackMatter}~
%  \end{document}


% Trying to set page of pages
% \usepackage{lastpage}
% \usepackage{fancyhdr}
% \cfoot{\thepage\ of \pageref{LastPage}}

% Setting geometry
%% Set page size with a wider right margin
%\geometry{a4paper, total={170mm,257mm}, left=20mm, top=20mm, bottom=20mm, right=50mm}
%