If the height of a cylinder increases by 10 decimeters, its side area will increase by 62.8 square decimeters. What is the area of the bottom of this cylinder?
一个圆柱，如果高增加10分米，它的侧面积就增加62.8平方分米，这个圆柱的底面积是多少呢？
<gadget id="calculator">62.8 / 10 / 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>