An isosceles right triangle with a waist length of 6 cm, how many cubic centimeters of space will it occupy if it is rotated around the waist for one revolution?
一个等腰直角三角形，腰长6厘米，如果以腰为轴旋转一周，占空间多少立方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">(1/3) * 3.14 * 36 * 6</gadget>
<output>226.08</output>

<result>226.08</result>