$${\mathtt{30}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{-{\mathtt{6}}} = {\mathtt{0.000\: \!03}}$$
$${{\mathtt{10}}}^{-{\mathtt{6}}} = {\mathtt{0.000\: \!001}}$$ $${{\mathtt{10}}}^{-{\mathtt{6}}} = {\frac{{\mathtt{1}}}{{{\mathtt{10}}}^{{\mathtt{6}}}}}$$
$${\mathtt{30}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{-{\mathtt{6}}} = {\mathtt{0.000\: \!03}}$$
$${{\mathtt{10}}}^{-{\mathtt{6}}} = {\mathtt{0.000\: \!001}}$$ $${{\mathtt{10}}}^{-{\mathtt{6}}} = {\frac{{\mathtt{1}}}{{{\mathtt{10}}}^{{\mathtt{6}}}}}$$