If the perimeter of a rectangle is 24 cm and the length and width are each increased by 5 cm, what is the increase in area in square centimeters?
一个长方形周长24厘米，长与宽各增加5厘米，面积增加多少平方厘米．
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">5 * 12</gadget>
<output>60</output>

<gadget id="calculator">60 + 25</gadget>
<output>85</output>

<result>85</result>