$\begin{array}{l} \text{Gegeben:}\\\text{Kreiszahl} \qquad \pi \qquad [] \\ \text{Radius} \qquad r \qquad [m] \\ \\ \text{Gesucht:} \\\text{Fläche} \qquad A \qquad [m^{2}] \\ \\ A = r^{2} \cdot \pi\\ \textbf{Gegeben:} \\ \pi=3\frac{16}{113} \qquad r=6\frac{1}{10}m \qquad \\ \\ \textbf{Rechnung:} \\ A = r^{2} \cdot \pi \\ \pi=3\frac{16}{113}\\ r=6\frac{1}{10}m\\ A = (6\frac{1}{10}m)^{2} \cdot 3\frac{16}{113}\\\\A=117m^{2} \\\\ \small \begin{array}{|l|} \hline r=\\ \hline 6\frac{1}{10} m \\ \hline 61 dm \\ \hline 610 cm \\ \hline 6,1\cdot 10^{3} mm \\ \hline 6,1\cdot 10^{6} \mu m \\ \hline \end{array} \small \begin{array}{|l|} \hline A=\\ \hline 117 m^2 \\ \hline 1,17\cdot 10^{4} dm^2 \\ \hline 1,17\cdot 10^{6} cm^2 \\ \hline 1,17\cdot 10^{8} mm^2 \\ \hline 1,17 a \\ \hline 0,0117 ha \\ \hline \end{array} \end{array}$