A square flowerbed with an area of 1 hectare increases the side length by 200 meters. How many hectares does the area of the flowerbed increase?
一个占地面积为1公顷的正方形花圃，边长增加200米，花圃面积增加多少公顷？
<gadget id="calculator">100 + 200</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>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<result>8</result>