Cut vertically downward along a diameter of the bottom of a cylinder, the cross-section is a square with a side length of 6 cm, what is its volume in cubic centimeters?
沿一个圆柱体底面的一条直径垂直向下切开，截面为一个边长6厘米的正方形，它的体积是多少立方厘米．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 6</gadget>
<output>169.56</output>

<result>169.56</result>