A conical wheat pile has a base circumference of 25.12 meters and a height of 2.1 meters. Put these wheats into a cylindrical grain storehouse with a bottom radius of 2 meters and just fill it up. How many meters high is this grain storehouse?
一个圆锥形麦堆，底面周长是25.12米，高是2.1米．把这些小麦装入底面半径是2米的圆柱形粮囤内正好装满，这个粮囤高多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">(1/3) * 3.14 * 16 * 2.1</gadget>
<output>35.168</output>

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

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

<gadget id="calculator">35.168 / 12.56</gadget>
<output>2.8</output>

<result>2.8</result>