Cut a piece of square wood with a side length of 12 cm and a height of 20 cm into the largest cylinder. If the cut cylinder is 20 cm high, what is the area of the bottom in square centimeters?
把一块横截面为边长12厘米，高20厘米的方木切割成一个最大的圆柱，如果切割成的圆柱高20厘米，底面积是多少平方厘米？
<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>