$$4 \frac { 4 } { 5 } \div \frac { 3 } { 5 } 5 + \frac { 4 } { 5 } \times \frac { 3 } { 10 } - \frac { 1 } { 5 }$$
$\frac{1001}{25}=40.04$
$$\frac{\left(4\times 5+4\right)\times 5}{5\times 3}\times 5+\frac{4}{5}\times \frac{3}{10}-\frac{1}{5}$$
$$\frac{4+4\times 5}{3}\times 5+\frac{4}{5}\times \frac{3}{10}-\frac{1}{5}$$
$$\frac{4+20}{3}\times 5+\frac{4}{5}\times \frac{3}{10}-\frac{1}{5}$$
$$\frac{24}{3}\times 5+\frac{4}{5}\times \frac{3}{10}-\frac{1}{5}$$
$$8\times 5+\frac{4}{5}\times \frac{3}{10}-\frac{1}{5}$$
$$40+\frac{4}{5}\times \frac{3}{10}-\frac{1}{5}$$
$$40+\frac{4\times 3}{5\times 10}-\frac{1}{5}$$
$$40+\frac{12}{50}-\frac{1}{5}$$
$$40+\frac{6}{25}-\frac{1}{5}$$
$$\frac{1000}{25}+\frac{6}{25}-\frac{1}{5}$$
$$\frac{1000+6}{25}-\frac{1}{5}$$
$$\frac{1006}{25}-\frac{1}{5}$$
$$\frac{1006}{25}-\frac{5}{25}$$
$$\frac{1006-5}{25}$$
$$\frac{1001}{25}$$
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$\frac{7 \cdot 11 \cdot 13}{5 ^ {2}} = 40\frac{1}{25} = 40.04$
