Teacher Li used a 56cm long iron wire to make a cuboid frame teaching aid with a length of 6cm and a width of 5cm. What is the height of this teaching aid in centimeters?
李老师用一根长56cm的铁丝，做成一个长6cm，宽5cm的长方体框架教具，这个教具的高是多少厘米？
<gadget id="calculator">56 / 4</gadget>
<output>14</output>

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

<result>3</result>