A conical sand pile with a bottom area of 125.6m**2 and a height of 3m. Use this pile of sand to pave a road with a width of 10m and a thickness of 4cm. How long can it be paved?
一圆锥形沙堆，底面积125.6m**2，高3m．用这堆沙铺在一条10m宽的公路上，铺4cm厚，能铺多长？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">3 / 10 / (1/25)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">(1/3) * 125.6 * (15/2)</gadget>
<output>314</output>

<result>314</result>