The product of any two irrational numbers is

State the number which is a whole number but not a natural number.

Visualize the representation of $2.6\overline{4}$ on the number line up to $5$ decimal places,that is,up to $2.64444$.

State whether the following statement is true or false:
Every whole number is a natural number.

Find the value of the following expression correct to three decimal places,rationalizing the denominator if needed. Given $\sqrt{2} = 1.414$,$\sqrt{3} = 1.732$,and $\sqrt{5} = 2.236$.
$\frac{1}{\sqrt{3} + \sqrt{2}}$

If $\sqrt{2}=1.414$ and $\sqrt{3}=1.732,$ find the value of $\frac{4}{3\sqrt{3}-2\sqrt{2}}+\frac{3}{3\sqrt{3}+2\sqrt{2}}.$