A rope is 31.4 meters long. Xiaogong uses this rope to enclose a square field on the playground, and Xiaolin uses this rope to enclose a circular field on the playground. Which of the two has the larger area, and how many square meters is larger?
一根绳子长31.4米，小工用这根绳子在操场上围出一块正方形的地，小林用这根绳子在操场上围出一块圆形的地．他俩谁围的面积大，大多少平方米？
<gadget id="calculator">31.4 / 2 / 3.14</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>