A conical grain mound has a base diameter of 6 meters and a height of 5 meters. If these grains are packed in a cylindrical grain storehouse with a base radius of 2 meters, how high can it be packed?
一个圆锥形的谷堆，底面直径是6米，高5米．如果把这些谷子装在一个底面半径为2米的圆柱形粮囤里，可以装多高？
<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 * 5</gadget>
<output>47.1</output>

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

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

<gadget id="calculator">47.1 / 12.56</gadget>
<output>3.75</output>

<result>3.75</result>