A rectangle with a length of 7 decimeters and a width of 5 decimeters, if the length is shortened to be the same as the width, what is the area of the figure obtained?
一个长方形，长7分米，宽5分米，如果将长缩短成与宽一样长，得到图形的面积是多少．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>