A cylinder with a height of 9 decimeters is cut into two equal parts along the diameter of the base to increase the surface area by 72 decimeters, what is the volume of the cylinder in cubic decimeters?
一个高为9分米的圆柱体，沿底面直径切成相等的两部分，表面积增加72平方分米，这个圆柱体的体积是多少立方分米．
<gadget id="calculator">72 / 2 / 9 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 9</gadget>
<output>113.04</output>

<result>113.04</result>