A cube of iron with a side length of 6 cm is made into an iron bar with a length of 108 cm. What is the cross-sectional area of the iron bar?
将一个棱长为6cm的正方体铁块打造成一根长为108cm的铁条，这根铁条的横截面积是多少．
<gadget id="calculator">6 / 108</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">6 * 6 * (1/18)</gadget>
<output>2</output>

<result>2</result>