There is a rectangular wheat field with a circumference of 1560 meters and a width 180 meters less than its length. What is its area in hectares?
有一块长方形麦地，周长1560米，宽比长少180米，它的面积是多少公顷．
<gadget id="calculator">1_560 / 2</gadget>
<output>780</output>

<gadget id="calculator">780 - 180</gadget>
<output>600</output>

<gadget id="calculator">600 / 2</gadget>
<output>300</output>

<gadget id="calculator">300 + 180</gadget>
<output>480</output>

<gadget id="calculator">600 / 2 / 10_000</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">480 * (3/100)</gadget>
<output>72/5 = around 14.4</output>

<result>72/5 = around 14.4</result>