There is a sidewalk with a width of 9 meters in the development zone, covering an area of 720 square meters. For convenience, the width of the road should be increased to 18 meters, and the length remains the same. How many square meters is the current sidewalk?
开发区有一条宽为9米的人行道，占地面积是720平方米，为了方便，道路的宽度要增加到18米，长不变，现在的这条人行道的面积是多少平方米？
<gadget id="calculator">720 / 9</gadget>
<output>80</output>

<gadget id="calculator">80 * 18</gadget>
<output>1_440</output>

<result>1_440</result>