The lateral expansion of a cylinder is a square. It is known that the radius of the base of this cylinder is 3cm. What is the volume of this cylinder in cm**3.
一个圆柱的侧面展开是正方形，已知这个圆柱的底面半径是3cm，这个圆柱的体积是多少cm**3．
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

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

<gadget id="calculator">3.14 * 9 * 18.84</gadget>
<output>532.4184</output>

<result>532.4184</result>