Wang Hong used a 314cm long iron wire to form a square and a circle respectively. Which figure has the largest area? How many square centimeters larger?
王红用一根长314cm的铁丝分别围成正方形和圆，围成的哪个图形的面积大？大多少平方厘米？
<gadget id="calculator">314 / 3.14 / 2</gadget>
<output>50</output>

<gadget id="calculator">50 ** 2</gadget>
<output>2_500</output>

<gadget id="calculator">3.14 * 2_500</gadget>
<output>7_850</output>

<gadget id="calculator">314 / 4</gadget>
<output>157/2 = around 78.5</output>

<gadget id="calculator">(157/2) * (157/2)</gadget>
<output>24_649/4 = around 6_162.25</output>

<gadget id="calculator">7_850 - (24_649/4)</gadget>
<output>6_751/4 = around 1_687.75</output>

<result>6_751/4 = around 1_687.75</result>