5/9* (-3,5) * (1(целая) 4/5) * 0,8= Решите Уравнение

Решите задачу:

$\frac{5}{9} \times ( - 3.5) \times 1 \frac{4}{5} \times 0.8 = \\ = \frac{5}{9} \times - \frac{35}{10} \times \frac{9}{5} \times \frac{8}{10} = \\ = - \frac{5 \times 35 \times 9 \times 8}{9 \times 10 \times 5 \times 10} =$

$\frac{35 \times 8}{10 \times 10} = \frac{ 7 \times 4}{10} = \frac{ 28}{10} = 2.8$