TeX Quellcode:

\begin{array}{rcl} A_O &=& 4\pi r^2 \cr A_O &=& 4\pi\cdot \left(\sqrt[3]{\dfrac{3V}{4\pi}} \right)^2 \cr A_O &=& 4\pi\cdot \left(\sqrt[3]{\dfrac{3\cdot 250\;cm^3}{4\pi}} \right)^2 \cr A_O &\approx& 191{,}92 \, cm^2 \end{array}