A path 2 meters wide is laid around a circular pond with a diameter of 10 meters. Find the area of the path in square meters.
在直径10米的圆形池塘的周围铺一条2米宽的小路，求路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>