A cylinder filled with corn has a bottom diameter of 3 meters and a height of 2 meters. If these corns are piled into a cone-shaped corn pile with a height of 2 meters, what is the area of the bottom of the cone?
一个装满玉米的圆柱形粮囤底面直径是3米，高2米．如果将这些玉米堆成一个高2米的圆锥形的玉米堆，圆锥底面积是多少？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) ** 2</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">3.14 * (9/4) * 2 * (3/2)</gadget>
<output>21.195</output>

<result>21.195</result>