The length, width, and height of a cuboid are 5cm, 4cm, and 2cm respectively, and the area of its smallest face is equal to the area of its largest face.
一个长方体的长、宽、高分别是5cm、4cm、2cm，它最小面的面积是最大面的面积的多少．
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">8 / 20</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>