Around a circular flower bed with a diameter of 3 meters, build a strip of bushes with a width of 1 meter. What is the area of this bush?
在一个直径为3米的圆形花坛四周，修一条宽1米的灌木丛带，这条灌木丛的面积为多少？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) + 1</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) ** 2</gadget>
<output>25/4 = around 6.25</output>

<gadget id="calculator">(3/2) ** 2</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">(25/4) - (9/4)</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<result>12.56</result>