3 2 10 6

\[ \frac{3}{10} \div \frac{2}{6} = \frac{3}{10} \cdot \frac{6}{2} = \frac{3 \cdot 6}{10 \cdot 2} = \frac{18}{20} = \frac{9}{10} \]

Ответ: \(\frac{9}{10}\)