Process a cuboid wood with a length of 20 cm, a width of 10 cm, and a height of 10 cm into the largest cylindrical wood block. What is the volume of this cylindrical block of wood as a percentage of the original cuboid block?
把一根长20厘米、宽10厘米、高10厘米的长方体木料加工成一个最大的圆柱形木块．这个圆柱形木块的体积是原来长方体木块的百分之几？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 20</gadget>
<output>1_570</output>

<gadget id="calculator">20 * 10 * 10</gadget>
<output>2_000</output>

<gadget id="calculator">1_570 / 2_000</gadget>
<output>157/200 = around 0.785</output>

<result>157/200 = around 0.785</result>