A rectangle has an area of 240 square decimeters and a width of 8 decimeters. If the length remains the same and the width increases to 16 decimeters, what is the area of the rectangle after expansion?
一个长方形的面积是240平方分米，宽为8分米．如果长不变，宽增加到16分米，扩建后长方形的面积是多少平方分米？
<gadget id="calculator">240 / 8</gadget>
<output>30</output>

<gadget id="calculator">30 * 16</gadget>
<output>480</output>

<result>480</result>