\(\frac{0.36 \times 5.4 \times 0.63}{4.2 \times 9.0 \times 2.4}\)

= \(\frac{36}{420} \times \frac{54}{90} \times \frac{63}{240}\)

= \(\frac{6}{70} \times \frac{18}{30} \times \frac{21}{80}\)

= \(\frac{27}{2000}\)

= 0.0135

\(\approx\) = 0.014