There is a square orchard with an area of 9 hectares. If their sides are extended by 200 meters, by how many hectares will the area of the orchard be increased?
有一个占地9公顷的正方形果园，如果它们边长延长200米，那么果园的面积增加多少公顷？
<gadget id="calculator">300 + 200</gadget>
<output>500</output>

<gadget id="calculator">500 * 500</gadget>
<output>250_000</output>

<gadget id="calculator">300 * 300</gadget>
<output>90_000</output>

<gadget id="calculator">250_000 - 90_000</gadget>
<output>160_000</output>

<gadget id="calculator">160_000 / 10_000</gadget>
<output>16</output>

<result>16</result>