b) $$rac{2}{3} \div \frac{1}{6}$$

b) $$\frac{2}{3} \div \frac{1}{6} = \frac{2}{3} \times \frac{6}{1} = \frac{2 \times 6}{3 \times 1} = \frac{12}{3} = 4$$

Ответ: 4