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

<gadget id="calculator">6 + 5</gadget>
<output>11</output>

<gadget id="calculator">14 - 11</gadget>
<output>3</output>

<result>3</result>