A conical wheat pile has a base radius of 3 meters and a height of 0.9 meters. If these wheats are piled in a cylindrical grain storehouse with a diameter of 4 meters, how high can the pile be?
一个圆锥形小麦堆，底面半径3米，高0.9米，把这些小麦堆放在直径是4米的圆柱形粮囤里，可以堆多高？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

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

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">0.9 / 12.56</gadget>
<output>0.071656</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 0.071656</gadget>
<output>0.675</output>

<result>0.675</result>