With a 60 cm long iron wire, it can be welded into a rectangular parallelepiped frame with a length of 6 cm, a width of 5 cm, and a height of how many centimeters (not counting the joints)
用一根长60厘米的铁丝，恰好可以焊成一个长6厘米、宽5厘米、高多少厘米的长方体框架(接头处不计)
<gadget id="calculator">60 / 4</gadget>
<output>15</output>

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

<gadget id="calculator">15 - 11</gadget>
<output>4</output>

<result>4</result>