The length, width, and height of a cuboid are 6cm, 5cm, and 4cm respectively. If the height increases by 1cm, how much will the volume increase in cm**3.
一个长方体的长、宽、高分别是6cm、5cm、4cm，如果高增加1cm，体积增加多少cm**3．
<gadget id="calculator">6 * 5 * 1</gadget>
<output>30</output>

<result>30</result>