A 56cm long iron wire can be welded into a cuboid teaching aid with a length of 6cm and a width of 5cm. What is the maximum height of this teaching aid in cm?
用一根56cm长的铁丝，可以焊成一个长6cm，宽5cm的长方体教具，这个教具的高最多是多少cm？
<gadget id="calculator">56 / 4</gadget>
<output>14</output>

<gadget id="calculator">14 - 6 - 5</gadget>
<output>3</output>

<result>3</result>