A sidewalk with a width of 2 meters is built along the outer end of a circular flower bed with a radius of 5 meters. What is the area of the sidewalk in square meters?
沿半径是5米的圆形花坛的外端，修一条宽2米的人行道路，则人行道的面积是多少平方米？
<gadget id="calculator">5 + 2</gadget>
<output>7</output>

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