24 cm long iron wire is welded into a cuboid frame with a width of 2 cm and a height of 1 cm. What is the length of the frame in cm?
把一根长24厘米的铁丝焊成一个宽2厘米、高1厘米的长方体框架，这个框架的长是多少厘米．
<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">6 - 2 - 1</gadget>
<output>3</output>

<result>3</result>