A conical sand pile has a bottom area of 31.4 square meters and a height of 2.4 meters. Use this pile of sand to pave a road with a thickness of 2 cm on a road with a width of 8 meters. How many meters can you pave?
一个圆锥形沙堆，底面积是31.4平方米，高是2.4米．用这堆沙在8米宽的公路上铺2厘米厚的路面，能铺多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">8 * (1/50)</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">2.4 / (4/25)</gadget>
<output>15</output>

<gadget id="calculator">(1/3) * 31.4 * 15</gadget>
<output>157</output>

<result>157</result>