A cuboid has length A cm, width 4 cm, and height B cm. If its height increases by 2 centimeters, how much will its volume increase by A centimeters?
一个长方体长A厘米、宽4厘米、高B厘米．如果它的高增加2厘米，那么体积比原来增加多少A厘米．
<result>8</result>