A cylinder has a base radius of 3 cm and a height of 10 cm. What is the volume of the cylinder?
一个圆柱的底面半径是3cm，高10cm，这个圆柱的体积是多少．
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 10</gadget>
<output>282.6</output>

<result>282.6</result>