A cone-shaped pile of sand has a circumference of 6.28 meters and a height of 0.6 meters. How long can this pile of sand pave a 5-centimeter-thick road on a 4-meter-long road?
一个圆锥形的沙堆，底面周长是6.28米，高是0.6米，用这堆沙在4米的路上铺5厘米厚的路面，能铺多长？
<gadget id="calculator">6.28 / 2 / 3.14</gadget>
<output>1</output>

<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">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">4 * (1/20)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">0.6 / (1/5)</gadget>
<output>3</output>

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

<result>3.14</result>