In order to build a garden city, a city built a circular flower bed on the outer ring road with a diameter of 10 meters, and planted a 2-meter-wide lawn around the flower bed. How many square meters is the area of the lawn?
为了建设园林城市，某市在外环路修了一个圆形花坛，直径是10米，绕着花坛周围种上2米宽的草坪，这快草坪的面积是多少平方米？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<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>