A conical pile of sand has a circumference of 25.12m at the bottom and a height of 3m. If this pile of sand is used to pave a road with a thickness of 2cm on a road with a width of 10m, how long can it be paved?
一个圆锥形沙堆，底面周长是25.12m，高3m，用这堆沙在10m宽的公路上铺2cm厚的路面，能铺多长？
<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">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">3 / 10 / (1/50)</gadget>
<output>15</output>

<gadget id="calculator">(1/3) * 16 * 15</gadget>
<output>80</output>

<result>80</result>