1. \(\frac{2}{7}\cdot\frac{42}{5}\)

Сократим \(42\) и \(7\): \(\frac{42}{7}=6\).

\[\frac{2}{7}\cdot\frac{42}{5}=\frac{2\cdot6}{5}=\frac{12}{5}=2\frac{2}{5}\]

Ответ: \(\frac{12}{5}\).