If the height of a cylinder is reduced by 2 meters, the area is reduced by 12.56 square meters. What is the radius of the base of the cylinder in meters?
一个圆柱，如果高减少2米，面积就减少了12.56平方米，这个圆柱的底面半径是多少米？
<gadget id="calculator">12.56 / 2 / 3.14 / 2</gadget>
<output>1</output>

<result>1</result>