cuboid with a length of 20 cm, a width of 10 cm, and a height of 8 cm, how many of these cuboids are stacked to make a cube?
一种长方体，长20厘米，宽10厘米，高8厘米，用这种长方体堆成一个正方体，至少需要多少个？
<gadget id="calculator">40 / 20</gadget>
<output>2</output>

<gadget id="calculator">40 / 10</gadget>
<output>4</output>

<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<gadget id="calculator">2 * 4 * 5</gadget>
<output>40</output>

<result>40</result>