The circumference of a circular fish pond is 188.4 meters. Now it is necessary to widen the circumference by 1 meter. What is the area of the widened part in square meters?
一个圆形养鱼池的周长是188.4米，现在要在周围加宽1米，加宽部分的面积是多少平方米？
<gadget id="calculator">188.4 / 3.14 / 2</gadget>
<output>30</output>

<gadget id="calculator">30 + 1</gadget>
<output>31</output>

<gadget id="calculator">31 ** 2</gadget>
<output>961</output>

<gadget id="calculator">3.14 * 961</gadget>
<output>3_017.54</output>

<gadget id="calculator">30 ** 2</gadget>
<output>900</output>

<gadget id="calculator">3.14 * 900</gadget>
<output>2_826</output>

<gadget id="calculator">3_017.54 - 2_826</gadget>
<output>191.54</output>

<result>191.54</result>