The length, width, and height of a cuboid block of wood are 5 cm, 4 cm, and 2 cm respectively. The smart mouse wants to saw it into a largest cube. What is the utilization rate of this block of wood?
一个长方体木块的长、宽、高分别是5厘米、4厘米、2厘米，机灵鼠要把它锯成一个最大的正方体，求这块木料的利用率？
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

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

<gadget id="calculator">8 / 40</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>