A square piece of land has a perimeter of 3200 meters. How many hectares is this land?
一块正方形土地，周长是3200米．这块土地有多少公顷？
<gadget id="calculator">3_200 / 4</gadget>
<output>800</output>

<gadget id="calculator">3_200 / 4 / 10_000</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">800 * (2/25)</gadget>
<output>64</output>

<result>64</result>