A conical sand pile has a base circumference of 6.28 meters and a height of 0.6 meters. Use this pile of sand to pave a 2 cm thick road on a 4 meter wide road. How many meters can be paved?
一个圆锥形沙堆，底面周长是6.28米，高是0.6米．用这堆沙在4米宽的路上铺2厘米厚的路面，能铺多少米长？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

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

<gadget id="calculator">(1/3) * 3.14 * 1 * 0.6</gadget>
<output>0.628</output>

<gadget id="calculator">4 * 0.02</gadget>
<output>0.08</output>

<gadget id="calculator">0.628 / 0.08</gadget>
<output>7.85</output>

<result>7.85</result>