A circle, when half of its diameter is cut off, the circumference of the remaining part is 13.68 cm less than the original, then what is the original area of the circle in square centimeters?
一个圆，当沿直径截去它的一半之后，剩下部分的周长比原来少了13.68cm，那么原来这个圆的面积是多少平方厘米？
<gadget id="calculator">12 ** 2</gadget>
<output>144</output>

<gadget id="calculator">3.14 * 144</gadget>
<output>452.16</output>

<result>452.16</result>