There is a large flower bed with a radius of 5 meters outside the residential area, and a circular walkway with a width of 2 meters outside the flower bed. What is the area of this walkway?
住宅小区外有一个半径5米的大花坛，花坛外还有一条宽2米的环形走道，这条走道的面积有多大？
<gadget id="calculator">5 + 2</gadget>
<output>7</output>

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

<gadget id="calculator">3.14 * 49</gadget>
<output>153.86</output>

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

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<gadget id="calculator">153.86 - 78.5</gadget>
<output>75.36</output>

<result>75.36</result>