A conical sand pile with a diameter of 6 meters at the bottom and a height of 9 meters is used for this pile of sand. How many meters can be paved on a 10-meter-wide road with a 2-centimeter-thick pavement?
一个圆锥形沙堆，底面直径是6米，高是9米，用这堆沙子在．10米宽的公路上铺2厘米厚的路面，能铺多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 9</gadget>
<output>84.78</output>

<gadget id="calculator">84.78 / 10 / 0.02</gadget>
<output>423.9</output>

<result>423.9</result>