The family came to rest on the square grass. The grassland has just been expanded, and the side length has been expanded from 8 meters to 16 meters. What is the area of the grassland after the expansion?
一家人来到正方形的草地上休息．草地刚刚扩建过，边长由原来的8米扩建成16米，扩建后的草地面积是多少？
<gadget id="calculator">16 * 16</gadget>
<output>256</output>

<result>256</result>