A rectangle becomes a square when its length is reduced by 6 centimeters. When the area of the square is 25 square centimeters, what is the area of the original rectangle?
一个长方形，当长减少6厘米后就变成一个正方形，该正方形的面积是25平方厘米时，原来长方形的面积是多少．
<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">11 * 5</gadget>
<output>55</output>

<result>55</result>