A playground is about 2500 square meters, how many hectares are 8 such playgrounds?
一个操场约2500平方米，8个这样的操场面积约多少公顷
<gadget id="calculator">2_500 * 8</gadget>
<output>20_000</output>

<gadget id="calculator">20_000 / 10_000</gadget>
<output>2</output>

<result>2</result>