A conical sand pile has a base radius of 2 meters and a height of 4.5 meters. Use this pile of sand to pave a road with a width of 10 meters to a thickness of 3 cm, how many meters can it be paved?
一个圆锥形沙堆底面半径是2米，高是4.5米．用这堆沙在10米宽的公路上铺3厘米厚，能铺多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) * 3.14 * 4 * 4.5</gadget>
<output>18.84</output>

<gadget id="calculator">10 * 0.03</gadget>
<output>0.3</output>

<gadget id="calculator">18.84 / 0.3</gadget>
<output>62.8</output>

<result>62.8</result>