There is a circular pool in the school. The measured circumference is 18.84 meters. Now it is necessary to build a cement road with a width of 1 meter around the pool. What is the area of the cement road in square meters?
学校有一个圆形水池，测得周长是18.84米，现在要绕水池修一条宽1米的水泥路，求水泥路面的面积是多少平方米？
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">50.24 - 28.26</gadget>
<output>21.98</output>

<result>21.98</result>