If the width of a rectangle is increased by 9 cm, it becomes a square with a side length of 25 cm. What is the area of the rectangle in square centimeters?
一个长方形，如果宽增加9厘米，就变成了一个边长为25厘米的正方形，这个长方形的面积是多少平方厘米？
<gadget id="calculator">25 - 9</gadget>
<output>16</output>

<gadget id="calculator">25 * 16</gadget>
<output>400</output>

<result>400</result>