A cone-shaped sand pile has a base radius of 1 meter and a height of 0.45 meters. Using this pile of sand to pave a 3 cm thick road on a 5 meter wide road, how many meters can be paved?
一个圆锥形沙堆底面半径是1米、高0.45米．用这堆沙在5米宽的公路上铺3厘米厚的路里面，能铺多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">(1/3) * 3.14 * 1 * 0.45</gadget>
<output>0.471</output>

<gadget id="calculator">5 * 0.03</gadget>
<output>0.15</output>

<gadget id="calculator">0.471 / 0.15</gadget>
<output>3.14</output>

<result>3.14</result>