The area of a rectangular lawn is 240 square meters, the width is increased by 3 times, and the length remains the same. What is the area of the expanded green space in square meters?
一个长方形草坪的面积为240平方米，宽扩大3倍，长不变．扩大后绿地的面积是多少平方米．
<gadget id="calculator">240 * 3</gadget>
<output>720</output>

<result>720</result>