A cylinder and a cone have a base radius of 3 cm and a height of 9 cm. What is their total volume in cubic centimeters?
一个圆柱和一个圆锥，底面半径都是3厘米，高都是9厘米．它们的体积一共是多少立方厘米？
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 9</gadget>
<output>254.34</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 9</gadget>
<output>84.78</output>

<gadget id="calculator">254.34 + 84.78</gadget>
<output>339.12</output>

<result>339.12</result>