\documentclass{article}

\usepackage{geometry}
\usepackage[dutch]{babel}
\usepackage{parskip}
\usepackage{amsmath,amssymb}
\usepackage{graphicx,subcaption}
\usepackage{xcolor}
\usepackage{adjustbox}
\usepackage{booktabs}
\usepackage{tabularx}

\geometry{
	paperwidth=9cm,
	paperheight=7.5cm,
	margin=0.0cm,
    paperheight=4cm,
    paperwidth=4.5cm
}

\begin{document}

% TODO Translate to english
\section{Nonsense}

Lorem ipsum dolor sit amet,
\textbf{ornare} sit amet.

\subsection{About $\sqrt{2}$}

\end{document}