In a square with a side length of 6 cm, cut out the largest circle. By what percent is the area of the circle smaller than the square?
在一个边长6厘米的正方形里，剪出一个最大的圆形．圆的面积比正方形小百分之几？
<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">36 - 28.26</gadget>
<output>7.74</output>

<gadget id="calculator">7.74 / 36</gadget>
<output>0.215</output>

<result>0.215</result>