A square whose edge length is 12dm is cut into a largest cylinder, find the area of the base of the cylinder.
一个棱长是12dm的正方形，削成一个最大的圆柱，求圆柱底面积．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<result>113.04</result>