A square nursery covering an area of 10,000 square meters is increased by 100 meters on each side. How many square meters is the area of the nursery increased?
一个占地1万平方米的正方形苗圃边长各增加100米，苗圃的面积增加多少平方米？
<gadget id="calculator">100 + 100</gadget>
<output>200</output>

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

<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>

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

<result>30_000</result>