$11 \times 468 \div 26 = ? + 8$

$0.01024 \times (0.4)^{9} = (0.4)^{?} \times (0.0256)^{3}$

$140 \%$ of $56 + 56 \%$ of $140 = ?$

$\left[ {10 + \left\{ {4 \times \left( {\overline {\frac{2}{3} + \frac{1}{4}} \times \sqrt {\frac{{144}}{{121}}} + 23} \right) \div 12 + 5} \right\} - 3} \right] = ?$

Which fraction among $\frac{3}{7}, \frac{5}{11}$,and $\frac{6}{13}$ is the largest?

Find the unit digit in the product $(4387)^{245} \times (621)^{72}$.