A rectangular piece of land is 18 meters long. If its length is increased to 22 meters and its width reduced by 3 meters, the size of the area remains exactly the same. What is the area of this rectangular piece of land in square meters?
一块长方形地长18米，如果把它的长增加到22米，宽减少3米，面积的大小正好不变，这块长方形地的面积是多少平方米．
<gadget id="calculator">22 * 3</gadget>
<output>66</output>

<gadget id="calculator">22 - 18</gadget>
<output>4</output>

<gadget id="calculator">66 / 4</gadget>
<output>33/2 = around 16.5</output>

<gadget id="calculator">18 * (33/2)</gadget>
<output>297</output>

<result>297</result>