$$$\lg\left(3\right)$$$

Laske $$$\log_{10}\left(3\right) = \lg\left(3\right) = \frac{\ln\left(3\right)}{\ln\left(10\right)}$$$.

Arvo on $$$\frac{\ln\left(3\right)}{\ln\left(10\right)}\approx 0.477121254719662$$$A.