Answer
$$4.67\times 10^{-23}.$$
Work Step by Step
We divide the two numbers as follows:
$$\left(\frac{ 0.0027\times 0.16 }{12,000}\right)^3
=\left(\frac{(2.7\times 10^{-3})(1.6\times 10^{-1})}{1.2\times 10^{4}}\right)^3
\\
=\left(\frac{ 4.32\times10^{-4} }{1.2\times10^4}\right)^3\\ =(3.6\times 10^{-8})^3 =4.67\times 10^{-23}.$$
