A cone of sand has a base radius of 12 meters and a height of 4 meters. How thick can the sand be spread on a road that is 314 meters long and 4 meters wide?
一个圆锥沙堆，底面半径是12米，高4米，把这些沙子铺在长314米，宽4米的道路上能铺多厚？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 ** 2</gadget>
<output>144</output>

<gadget id="calculator">314 * 4</gadget>
<output>1_256</output>

<gadget id="calculator">4 / 1_256</gadget>
<output>1/314 = around 0.003185</output>

<gadget id="calculator">(1/3) * 3.14 * 144 * (1/314)</gadget>
<output>0.48</output>

<result>0.48</result>