pile of conical sand, with a base area of 6.28 square meters and a height of 3 meters, is laid on a road with a width of 10 meters. If the thickness of the sand is 2 cm, how long can it be spread?
一堆圆锥形的沙子，底面积是6.28平方米，高是3米，把铺在一条宽10米的公路上，如果沙子的厚度为2厘米，可以铺多长？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">10 * (1/50)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 / (1/5)</gadget>
<output>15</output>

<gadget id="calculator">(1/3) * 6.28 * 15</gadget>
<output>31.4</output>

<result>31.4</result>