$ \text{Gegeben:}\\\text{Grundlinie} \qquad g \qquad [m] \\ \text{Höhe} \qquad h \qquad [m] \\ \\ \text{Gesucht:} \\\text{Fläche} \qquad A \qquad [m^{2}] \\ \\ A = \frac{g \cdot h}{2}\\ \textbf{Gegeben:} \\ g=0,002m \qquad h=\frac{2}{5}m \qquad \\ \\ \textbf{Rechnung:} \\ A = \frac{g \cdot h}{2} \\ g=0,002m\\ h=\frac{2}{5}m\\ A = \frac{0,002m \cdot \frac{2}{5}m}{2}\\\\A=0,0004m^{2} \\\\\\ \small \begin{array}{|l|} \hline g=\\ \hline 0,002 m \\ \hline \frac{1}{50} dm \\ \hline \frac{1}{5} cm \\ \hline 2 mm \\ \hline 2\cdot 10^{3} \mu m \\ \hline \end{array} \small \begin{array}{|l|} \hline h=\\ \hline \frac{2}{5} m \\ \hline 4 dm \\ \hline 40 cm \\ \hline 400 mm \\ \hline 4\cdot 10^{5} \mu m \\ \hline \end{array} \small \begin{array}{|l|} \hline A=\\ \hline 0,0004 m^2 \\ \hline \frac{1}{25} dm^2 \\ \hline 4 cm^2 \\ \hline 400 mm^2 \\ \hline 4\cdot 10^{-6} a \\ \hline 4\cdot 10^{-8} ha \\ \hline \end{array}$