The diameter of the garden in the center of the street is 10 meters. Now a 1-meter-wide ring road is built around it. What is the area of the ring road? ．
街心花园的直径是10米，现在它的周围修一条1米宽的环形路，环形路的面积是多少？．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

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

<gadget id="calculator">36 - 25</gadget>
<output>11</output>

<gadget id="calculator">3.14 * 11</gadget>
<output>34.54</output>

<result>34.54</result>