TeX Quellcode:

\begin{array}{rclcc} a^2 &=& c \cdot p & \vert & :c \cr p &=& \dfrac{a^2}{c} \cr \cr &=& \dfrac{3{,}4^2}{6{,}1} \cr & \approx & 1{,}90 \, cm \end{array}