If a square with a side length of 5 cm increases by 2 cm, its area increases by how many square centimeters.
一个边长为5厘米的正方形，如果它的边长增加2厘米，那么它的面积增加了多少平方厘米．
<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">7 * 7</gadget>
<output>49</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">49 - 25</gadget>
<output>24</output>

<result>24</result>