Use a 100 cm long iron wire to make exactly a cuboid frame with a length of 12 cm, a width of 8 cm, and a height of cm.
用一根100厘米长的铁丝正好制成一个长12厘米、宽8厘米、高多少厘米的长方体框架．
<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">12 + 8</gadget>
<output>20</output>

<gadget id="calculator">25 - 20</gadget>
<output>5</output>

<result>5</result>