There is a square fish pond in the park. If its circumference is measured to be 160 meters, what is its area in square meters?
公园里有一个正方形的养鱼池．量得它的周长是160米，这的面积是多少平方米？
<gadget id="calculator">160 / 4</gadget>
<output>40</output>

<gadget id="calculator">40 * 40</gadget>
<output>1_600</output>

<result>1_600</result>