Cut the largest circle out of a square cardboard with a side length of 12 cm, what is the remaining area?
在一个边长为12厘米的正方形纸板里剪出一个最大的圆，剩下的面积是多少．
<gadget id="calculator">12 * 12</gadget>
<output>144</output>

<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>

<gadget id="calculator">144 - 113.04</gadget>
<output>30.96</output>

<result>30.96</result>