There is a circular pool with a diameter of 10 meters in the park. A circular walkway with a width of 2 meters is built around the pool. What is the area of the circular walkway in square meters?
公园里有一个直径10米的圆形水池，在水池周围建宽2米的环形步行道，这个环形步行道的面积是多少平方米．
<gadget id="calculator">10 + 2 + 2</gadget>
<output>14</output>

<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<gadget id="calculator">7 ** 2</gadget>
<output>49</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">49 - 25</gadget>
<output>24</output>

<gadget id="calculator">3.14 * 24</gadget>
<output>75.36</output>

<result>75.36</result>