If the base radius and height of a cone are both 3 cm, what is the volume of a cylinder with the same base and height in cubic centimeters?
圆锥的底面半径和高都是3厘米，与它等底等高的圆柱体体积是多少立方厘米．
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 3</gadget>
<output>84.78</output>

<result>84.78</result>