On the wheat threshing ground of a professional household, there is a wheat pile approximately in the shape of a cone, with a measured bottom diameter of 4 meters and a height of 1.5 meters. Now it is planned to pack these wheats into a cylindrical grain storehouse with a base diameter of 2 meters. What is the minimum height of the grain storehouse?
一专业户的打麦场上有一个近似于圆锥形的小麦堆，测得底面直径是4米，高是1.5米．现计划把这些小麦装进一个底面直径是2米的圆柱形粮囤里，粮囤的高最少是多少米？
<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">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 1.5</gadget>
<output>6.28</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<gadget id="calculator">6.28 / 3.14</gadget>
<output>2</output>

<result>2</result>