A conical grain pile is piled on the ground of the granary. The radius of the conical bottom is 3m and the height is 2m.
粮仓的地面上堆放着一个圆锥形粮堆，圆锥底面半径3m，高2m，若把这些麦子装进底面半径2m的梁囤，能堆多高？
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 9 * 2 * (1/3)</gadget>
<output>18.84</output>

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

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

<gadget id="calculator">18.84 / 12.56</gadget>
<output>1.5</output>

<result>1.5</result>