A section of steel can be made into a cylindrical part with a base circumference of 25.12 cm and a height of 9 cm. If it is transformed into a conical part with a height of 12 cm, what is the area of the base of the conical part in square centimeters?
有一段钢材可做成一个底面周长是25.12厘米，高是9厘米的圆柱形零件．如果把它改造成高是12厘米的圆锥形零件，圆锥形零件的底面积是多少平方厘米？
<gadget id="calculator">4 / 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>

<gadget id="calculator">3 / 12</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">113.04 * (1/4)</gadget>
<output>28.26</output>

<result>28.26</result>