After unfolding the sides of a cylinder, a square with a perimeter of 25.12 decimeters is obtained. What is the area of the base of this cylinder in square decimeters?
把一个圆柱的侧面展开后得到一个周长25.12分米的正方形，这个圆柱的底面积是多少平方分米？
<gadget id="calculator">25.12 / 4 / 3.14 / 2</gadget>
<output>1</output>

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

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

<result>3.14</result>