Li Song walked 4 times along the square playground, a total of 1200 meters. How many square meters is the playground?
李宋沿正方形的操场走了4圈，共走了1200米，操场的面积是多少平方米？
<gadget id="calculator">1_200 / 4 / 4</gadget>
<output>75</output>

<gadget id="calculator">75 * 75</gadget>
<output>5_625</output>

<result>5_625</result>