For a cylinder, if its height increases by 1 centimeter, its lateral area increases by 12.56 square centimeters. What is the radius of the base of this cylinder in cm?
一个圆柱体，如果它的高增加1厘米，它的侧面积就增加12.56平方厘米．这个圆柱体的底面半径是多少厘米．
<gadget id="calculator">12.56 / 1 / 3.14 / 2</gadget>
<output>2</output>

<result>2</result>