Divide a cylinder into two evenly along its diameter, the surface area increases by 36 decimeters, the height of the cylinder is 6 decimeters, what is the volume in cubic decimeters.
把一个圆柱体沿直径平均分成两份，表面积增加了36平方分米，圆柱的高是6分米，体积是多少立方分米．
<gadget id="calculator">36 / 2 / 6</gadget>
<output>3</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) ** 2</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">3.14 * (9/4)</gadget>
<output>7.065</output>

<gadget id="calculator">7.065 * 6</gadget>
<output>42.39</output>

<result>42.39</result>