\(\text{Zet }3960000\cdot 10^{2}\text{ }l\text{ om in }dl\)
\(\color{red}{3960000}.10^{2}\text{ }l\)
\(=\color{red}{3{,}96.10^{6}}.10^{2}\text{ }l=\color{red}{3{,}96.10^{8}}\text{ }\color{blue}{l}\) (Wetenschappelijke notatie)
\(=3{,}96.10^{8}.\color{blue}{10^{1}\text{ }dl}=3{,}96.10^{9}\text{ }dl\) (Eenheden omzetten)\(\)