TeX Quellcode:

\begin{array}{rclcl} \log_{10}(1.000\cdot 100) &=& \log_{10}(1.000)+\log_{10}(100) &\vert& \text{1. Logarithmengesetz} \cr&=& \log_{10}(10^3)+\log_{10}(10^2) \cr&=& 3+2 \cr&=& 5 \end{array}