Put a 9 cm high conical plumb weight into a cylindrical glass vessel with a bottom diameter of 6 cm and immerse it in water. The water in the glass vessel rises by 2 cm compared to the original (does not overflow). What is the area of the base of the cone in square centimeters? (π takes 3.14)
把一个高9厘米的圆锥体铅锤，放入一个底面内直径是6厘米的圆柱形玻璃器皿里浸没水中，玻璃器皿里的水比原来上升了2厘米(不溢出)．这个圆锥体的底面积是多少平方厘米？(π取3.14)
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

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

<gadget id="calculator">(1/3) * 9</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">9 * 3.14 * (2/3)</gadget>
<output>18.84</output>

<result>18.84</result>