One side of a square is cut off by 5 meters, and the adjacent side is also cut off by 5 meters. The area after cutting is 255 square meters less than the area of the original square. Find the area of the original square?
一个正方形边长的一边截去5米，相邻的一边也截去5米，截后的面积比原来正方形的面积少255平方米，求原正方形的面积？
<gadget id="calculator">200 / 2 / 5</gadget>
<output>20</output>

<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<gadget id="calculator">25 * 25</gadget>
<output>625</output>

<result>625</result>