Решение:
\[ 1,4 = \frac{14}{10} = \frac{7}{5} \]
\[ \frac{5}{3} \times \frac{2}{9} \times \frac{7}{5} = \frac{5 \times 2 \times 7}{3 \times 9 \times 5} \]
\[ \frac{\cancel{5} \times 2 \times 7}{3 \times 9 \times \cancel{5}} = \frac{2 \times 7}{3 \times 9} = \frac{14}{27} \]
Ответ: 14/27