Ответ:

Сократим \(42\) и \(7\):

\(\frac{2}{7}\cdot\frac{42}{5}=2\cdot\frac{6}{5}=\frac{12}{5}=2\frac{2}{5}\).

Ответ: \(\frac{12}{5}\) (или \(2\frac{2}{5}\)).