Use a 60 cm long iron wire to make a cuboid frame, which is 6 cm long, 4 cm wide, and what is the height in cm.
用一根长60厘米的铁丝，做成一个长方体框架，它长6厘米，宽4厘米，高是多少厘米．
<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<gadget id="calculator">15 - 6 - 4</gadget>
<output>5</output>

<result>5</result>