Two ropes are 6.28 meters long, respectively enclosing the largest square and the largest circle, which area is larger? How big is it?
两根都是6.28米的绳子，分别围成一个最大的正方形和和最大的圆，哪个面积大？大多少？
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<gadget id="calculator">6.28 / 4</gadget>
<output>1.57</output>

<gadget id="calculator">1.57 * 1.57</gadget>
<output>2.4649</output>

<gadget id="calculator">3.14 - 2.4649</gadget>
<output>0.6751</output>

<result>0.6751</result>