If the length of a rectangular piece of land is reduced by 100 meters, it can become a square piece of land, and its area is reduced by 2 hectares. Now the width of the rectangular piece of land is extended by 100 meters. What is the area of this piece of land at this time?
一块长方形土地，如果长减少100米，它就能成为一块正方形土地，其面积减少2公顷，现在把长方形土地的宽延长100米，那么此时这块土地的面积是多少公顷？
<gadget id="calculator">10_000 / 100</gadget>
<output>100</output>

<gadget id="calculator">2 * 100</gadget>
<output>200</output>

<gadget id="calculator">200 + 100</gadget>
<output>300</output>

<gadget id="calculator">300 / 10_000</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">300 * (3/100)</gadget>
<output>9</output>

<result>9</result>