Вычислите значение выражения

а) $$\frac{5}{6} \cdot 0,3 = \frac{5}{6} \cdot \frac{3}{10} = \frac{15}{60} = \frac{1}{4} = 0,25$$ б) $$\frac{5}{6} : 0,6 = \frac{5}{6} : \frac{6}{10} = \frac{5}{6} : \frac{3}{5} = \frac{5}{6} \cdot \frac{5}{3} = \frac{25}{18} = 1\frac{7}{18}$$ в) $$\frac{2\frac{2}{7} + 1\frac{3}{14}}{3,5} = \frac{\frac{16}{7} + \frac{17}{14}}{3,5} = \frac{\frac{32}{14} + \frac{17}{14}}{3,5} = \frac{\frac{49}{14}}{3,5} = \frac{\frac{7}{2}}{3,5} = \frac{3,5}{3,5} = 1$$ г) $$\frac{6,3 - 1\frac{1}{6}}{2\frac{2}{3}} = \frac{6,3 - \frac{7}{6}}{\frac{8}{3}} = \frac{\frac{63}{10} - \frac{7}{6}}{\frac{8}{3}} = \frac{\frac{189 - 35}{30}}{\frac{8}{3}} = \frac{\frac{154}{30}}{\frac{8}{3}} = \frac{154}{30} \cdot \frac{3}{8} = \frac{154 \cdot 3}{30 \cdot 8} = \frac{154}{10 \cdot 8} = \frac{77}{40} = 1\frac{37}{40} = 1,925$$ д) $$\frac{72 \cdot 1,8}{0,4 \cdot 0,08} = \frac{129,6}{0,032} = 4050$$ е) $$\frac{2,7}{0,09} = 30$$