How many classrooms of 50 square meters have an area of about 1 hectare.
多少个50平方米的教室面积大约是1公顷．
<gadget id="calculator">10_000 / 50</gadget>
<output>200</output>

<gadget id="calculator">1 * 200</gadget>
<output>200</output>

<result>200</result>