What is the simplified value of the following ? $\frac{9 \div \frac{3}{7} \text { of }(9+6 \times \overline{4-2})+\left[\frac{1}{5} \div \frac{7}{25}-\left\{\frac{5}{8}+\frac{6}{16}\right\}\right]}{24 \div \overline{16-10}+36 \div(5+20 \div 4-1)}$

$\frac{40}{7}$ $\frac{5}{56}$ $\frac{7}{40}$ $\frac{51}{56}$

$\frac{5}{56}$