There is a conical beach with a base radius of 4 meters and a height of 1.2 meters. If the sand is spread on a road with a length of 31.4 meters and a width of 2 meters, how many meters is the sand thick?
有一个圆锥形沙滩，底面半径是4米，高是1.2米，把这些沙子铺在一条长31.4米，宽2米的道路上，沙子厚多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">31.4 * 2</gadget>
<output>62.8</output>

<gadget id="calculator">1.2 / 62.8</gadget>
<output>0.019108</output>

<gadget id="calculator">(1/3) * 3.14 * 16 * 0.019108</gadget>
<output>0.319995</output>

<result>0.319995</result>