The circumference of a circular fountain is 62.8 meters. Build a 1-meter-wide path around the fountain and pave the path with floor tiles. How many square meters is the floor tile area?
一个圆形喷水池的周长是62.8米，绕着这个喷水池修一条1米宽的小路，并给小路铺上地砖．铺地砖的面积大约是多少平方米？
<gadget id="calculator">62.8 / 3.14 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<gadget id="calculator">11 ** 2</gadget>
<output>121</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">121 - 100</gadget>
<output>21</output>

<gadget id="calculator">3.14 * 21</gadget>
<output>65.94</output>

<result>65.94</result>