40 cm long iron wire can be used to form a cuboid with a length of 5 cm, a width of 3 cm, and a height of cm.
用一根40厘米长的铁丝，可以围成一个长5厘米，宽3厘米，高多少厘米的长方体．
<gadget id="calculator">40 / 4</gadget>
<output>10</output>

<gadget id="calculator">10 - 5 - 3</gadget>
<output>2</output>

<result>2</result>