The two ropes are 31.4 meters long, and they respectively form a square and a circle. Which one has the larger area, the square or the circle? How many square meters is it?
两根都是31.4米长绳子，分别围成正方形和圆，正方形和圆哪一个面积大？大多少平方米？
<gadget id="calculator">31.4 / 3.14 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<gadget id="calculator">31.4 / 4</gadget>
<output>7.85</output>

<gadget id="calculator">7.85 * 7.85</gadget>
<output>61.6225</output>

<gadget id="calculator">78.5 - 61.6225</gadget>
<output>16.8775</output>

<result>16.8775</result>