In a cuboid box with a length of 5 decimeters and a width of 4 decimeters, a cube of iron with a side length of 2 decimeters is placed, how much will the water level rise?
在长为5分米，宽为4分米的长方体箱中，放入棱长2分米的正方体铁块，水面上升多少分米？
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<gadget id="calculator">8 / 5 / 4</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>