Use an iron wire with a length of 56 cm to weld a rectangular parallelepiped frame with a length of 8 cm, a width of 4 cm, and a height of cm.
用一根长56cm的铁丝，恰好焊接成长8cm，宽4cm，高多少cm的长方体框架．
<gadget id="calculator">56 / 4</gadget>
<output>14</output>

<gadget id="calculator">8 + 4</gadget>
<output>12</output>

<gadget id="calculator">14 - 12</gadget>
<output>2</output>

<result>2</result>