A cone-shaped sand pile has a bottom circumference of 25.12 meters and a height of 3 meters. If the sand is spread on a road with a width of 4 meters, how many meters can be laid if it is 5 cm thick?
一个圆锥形沙堆底面周长是25.12米，高3米，把这些沙平铺在一条宽4米的道路上，如果铺5厘米厚，可以铺多少米长．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">(1/3) * 3.14 * 16 * 3</gadget>
<output>50.24</output>

<gadget id="calculator">4 * 0.05</gadget>
<output>0.2</output>

<gadget id="calculator">50.24 / 0.2</gadget>
<output>251.2</output>

<result>251.2</result>