There is a pile of nearly conical sand on the construction site. The circumference of the bottom surface is 31.4m and the height is 2.4m. Use this pile of sand to pave a road with a width of 4m and a thickness of 10cm. How many meters can be paved?
工地有一堆近似圆锥形的沙子，量得底面周长是31.4m，高是2.4m，用这堆沙子铺一条宽4m路面，铺沙厚度为10cm，能铺多少米长？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">31.4 / 6.28</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * 2.4</gadget>
<output>62.8</output>

<gadget id="calculator">4 * 0.1</gadget>
<output>0.4</output>

<gadget id="calculator">62.8 / 0.4</gadget>
<output>157</output>

<result>157</result>