б) $$1\frac{4}{11}\cdot3\frac{1}{3}:3\frac{4}{7} = $$

б) $$1\frac{4}{11}\cdot3\frac{1}{3}:3\frac{4}{7} = \frac{15}{11}\cdot\frac{10}{3}:\frac{25}{7}=\frac{15}{11}\cdot\frac{10}{3}\cdot\frac{7}{25}=\frac{15\cdot10\cdot7}{11\cdot3\cdot25}=\frac{1050}{825}=\frac{42}{33}=\frac{14}{11}=1\frac{3}{11}$$

Ответ: $$1\frac{3}{11}$$