\begin{definition}[Definition:Napierian Logarithm]
The '''Napierian logarithms''' are a system of logarithms where:
:$\log_{\text {Nap} } 10 \, 000 \, 000 = 0$
:$\log_{\text {Nap} } 9 \, 999 \, 999 = 1$
Thus:
:$\log_{\text {Nap} } 10^7 x y = \log_{\text {Nap} } x + \log_{\text{Nap} } y$
\end{definition}