A square open-air garbage dump covering an area of 16 hectares has been reduced by 200 meters in length and 100 meters in width after renovation. How many hectares does this garbage dump occupy now?
一个占地16公顷的正方形露天垃圾场，改造后长减少200米，宽减少100米，现在这个垃圾场占地多少公顷？
<gadget id="calculator">400 - 200</gadget>
<output>200</output>

<gadget id="calculator">400 - 100</gadget>
<output>300</output>

<gadget id="calculator">300 / 10_000</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">200 * (3/100)</gadget>
<output>6</output>

<result>6</result>