\[\frac{10^{17} \cdot \left( 10^{2} \right)^{3}}{\left( 10^{3} \right)^{4} \cdot 10^{9}} = \frac{10^{17} \cdot 10^{6}}{10^{12} \cdot 10^{9}} =\]
\[= \frac{10^{23}}{10^{21}} = 10² = 100\]