Uncle Li’s family has a circular nursery with a diameter of 10 meters. Now he wants to widen 2 meters around the nursery, how much does the area of the nursery increase?
李大爷家有一块圆形苗圃，苗圃的直径是10米．现在他想在苗圃周围加宽2米，苗圃的面积增加了多少？
<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>