The perimeter of a rectangle is 24 meters. If the length and width are each increased by 5 meters, how many square meters will the area be increased?
一个长方形的周长是24米，如果长和宽各增加5米，那么面积将增加多少平方米？
<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>