A 48cm long iron wire can be welded into a cuboid frame with a length of 5cm, a width of 4cm and a height of cm.
一根48cm长的铁丝，能焊成一个长5cm，宽4cm，高多少cm的长方体框架．
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">12 - 9</gadget>
<output>3</output>

<result>3</result>