TeX Quellcode:

\begin{array}{rclcc} b^2 &=& q \cdot c & \vert & :q \cr c &=& \dfrac{b^2}{q} \cr \cr &=& \dfrac{5{,}2^2}{1{,}2} \cr & \approx & 22 {,}53 \, cm \end{array}