If a circle with a radius of 3 cm is cut out of a circular piece of paper with a radius of 8 cm, what is the remaining area in square centimeters?
在一张半径为8厘米的圆形纸片中，剪去一个半径为3厘米的圆，剩下的面积是多少平方厘米．
<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64</gadget>
<output>200.96</output>

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

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

<gadget id="calculator">200.96 - 28.26</gadget>
<output>172.7</output>

<result>172.7</result>