The diameter of the inner bottom of a cylindrical grain hoard is 2 meters and the height is 1.2 meters. Now store the full grain in a conical grain hoard with a bottom radius of 2 meters. How high is the grain?
一个圆柱形粮囤的内底直径是2米，高1.2米．现把装满的粮食改存放在底面半径是2米的圆锥形粮囤里，粮食有多高？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>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">3 / 12.56</gadget>
<output>0.238854</output>

<gadget id="calculator">3.14 * 1 * 1.2 * 0.238854</gadget>
<output>0.900002</output>

<result>0.900002</result>