The perimeter of the base of a cuboid is 8m, if its height increases by 3m, its area will increase by how many cubic meters.
一个长方体的底面周长是8m，如果它的高增加了3m，它的面积就增加多少立方米．
<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<result>24</result>