If the radius of the circle increases by one-fifth, then its area increases by 88 square decimeters. What is the original area of the circle in square decimeters?
如果圆的半径增加五分之一，那么它的面积就增加88平方分米，原来圆的面积是多少平方分米？
<gadget id="calculator">36 / 25</gadget>
<output>36/25 = around 1.44</output>

<gadget id="calculator">(36/25) - 1</gadget>
<output>11/25 = around 0.44</output>

<gadget id="calculator">88 / (11/25)</gadget>
<output>200</output>

<result>200</result>