9. \(\frac{14}{21}\cdot\frac{1}{7}\)

Сократим \(\frac{14}{21}=\frac{2}{3}\):

\(\frac{14}{21}\cdot\frac{1}{7}=\frac{2}{3}\cdot\frac{1}{7}=\frac{2}{21}\).

Ответ: \(\frac{2}{21}\).