If a right-angled triangle with a base of 3 cm and a height of 2 cm is rotated once about the height, what is the volume of the object in cubic centimeters?
一个底为3厘米，高为2厘米的直角三角形，以高为轴旋转一周，得到的物体体积是多少立方厘米．
<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">3.14 * 9 * 2 * (1/3)</gadget>
<output>18.84</output>

<result>18.84</result>