There is a square vegetable field covering an area of 1 hectare. If its sides are extended by 100 meters, how many hectares will the area of the vegetable field increase?
有一块占地1公顷的正方形菜地，如果它的边各延长100米，那么菜地的面积增加多少公顷？
<gadget id="calculator">100 + 100</gadget>
<output>200</output>

<gadget id="calculator">200 * 200</gadget>
<output>40_000</output>

<gadget id="calculator">1 * 10_000</gadget>
<output>10_000</output>

<gadget id="calculator">40_000 - 10_000</gadget>
<output>30_000</output>

<gadget id="calculator">30_000 / 10_000</gadget>
<output>3</output>

<result>3</result>