$1.2 \times 1.02 \times 1.002 = ?$

$(0 . \overline{09} \times 7 . \overline{3})$ is equal to

What is the value of $\frac{2.75 \times 2.75 \times 2.75 - 2.25 \times 2.25 \times 2.25}{2.75 \times 2.75 + 2.75 \times 2.25 + 2.25 \times 2.25}$?

What will come in place of the question mark (?) in the following question?
$335.01 \times 244.99 \div 55 = ?$

What should come in place of the question mark $(?)$ in the following expression?
$820.15 + 2379.85 + 140.01 \times 4.99 = ?$

Simplify:
$\frac{3}{10} \div \frac{3}{7} \text{ of } \left(2 \frac{3}{10} + 2 \frac{3}{5}\right) + \frac{1}{5} \div 1 \frac{2}{5} - \frac{2}{7}$