A cylinder has a base radius of 4 cm and a height of 12 cm. What is the volume of the cylinder?
一个圆柱的底面半径是4cm，高为12cm，这个圆柱的体积是多少．
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 12</gadget>
<output>602.88</output>

<result>602.88</result>