A square pond has a circumference of 1200 meters. How many hectares does this pond occupy?
一个正方形水池，周长1200米，这个水池占地多少公顷？
<gadget id="calculator">1_200 / 4</gadget>
<output>300</output>

<gadget id="calculator">1_200 / 4 / 10_000</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">300 * (3/100)</gadget>
<output>9</output>

<result>9</result>