A cylinder of plasticine has a base radius of 2 cm and a height of 3 cm. Pinch it into the largest cone with a height of 2 cm. What is the area of the base of this cone in square centimeters?
一个圆柱形橡皮泥，底面半径2厘米，高3厘米．把它捏成高是2厘米的最大圆锥体，这个圆锥体的底面积是多少平方厘米？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / (1/3) / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">3.14 * 4 * (9/2)</gadget>
<output>56.52</output>

<result>56.52</result>