A conical pile of sand has a bottom diameter of 10 meters and a height of 9 meters. How long can this pile of sand be spread on a road with a width of 5 meters and a thickness of 20 centimeters?
一个圆锥形沙堆，底面直径是10米，高是9米，用这堆沙子铺在宽5米，厚20厘米的公路上，可以铺多长？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

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

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5 * (1/5)</gadget>
<output>1</output>

<gadget id="calculator">9 / 1</gadget>
<output>9</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * 9</gadget>
<output>235.5</output>

<result>235.5</result>