conical pile of sand has a bottom diameter of 6m and a height of 3m. If this pile of sand is used to pave a straight runway with a width of 3m and a thickness of 0.3m, how many meters of runway can be paved?
一个圆锥形沙堆，底面直径是6m，高是3m，如果用这堆沙去铺一条宽3m的直跑道，要求铺0.3m厚，可以铺多少米长的跑道？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 3</gadget>
<output>28.26</output>

<gadget id="calculator">3 * 0.3</gadget>
<output>0.9</output>

<gadget id="calculator">28.26 / 0.9</gadget>
<output>31.4</output>

<result>31.4</result>