A circle is formed by a wire 12.56 decimeters long, what is the area of the circle in square centimeters?
用一根12.56分米长的铁丝围成一个圆，这个圆的面积是多少平方厘米．
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">3.14 * 2 * 2 * 100</gadget>
<output>1_256</output>

<result>1_256</result>