If the side length of a square is increased by 2cm, the area is increased by 20cm**2, what is the area of the enlarged square in cm**2?
一个正方形的边长增加2cm，面积增加20cm**2，扩大后正方形面积为多少cm**2．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">20 - 4</gadget>
<output>16</output>

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

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

<gadget id="calculator">16 + 20</gadget>
<output>36</output>

<result>36</result>