A conical pile of sand has a base circumference of 12.56 meters and a height of 3 meters. If it is paved on a road with a width of 2 meters and a thickness of 4 cm, how long can it be paved?
一堆圆锥形沙子，底面周长12.56米，高3米．如果把它铺在宽2米，厚4厘米的公路上，能铺多长？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">2 * (1/25)</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">3 / (2/25)</gadget>
<output>75/2 = around 37.5</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * (75/2)</gadget>
<output>157</output>

<result>157</result>