One side of an isosceles right triangle is 3 cm long. If it is rotated around any one side as the axis, how many cubic centimeters of space will it occupy?
一个等腰直角三角形的一条直角边长3厘米，如果以任一条直角边为轴旋转一周，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">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 3</gadget>
<output>28.26</output>

<result>28.26</result>