With a 64 cm long iron wire, it can just weld a cuboid mold with a length of 6 cm, a width of 4 cm, and a height of several centimeters.
用一根64厘米长的铁丝，正好可以焊成长6厘米，宽4厘米，高多少厘米的长方体模具．
<gadget id="calculator">64 / 4</gadget>
<output>16</output>

<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">16 - 10</gadget>
<output>6</output>

<result>6</result>