A wire just encloses a square frame with a side length of 16 cm. Now this wire is changed to a rectangular frame with a length of 24 cm and a width of 6 cm. How many centimeters are left of the wire?
一根铁丝正好围成边长为16厘米的正方形框架，现在把这根铁丝改围成长24厘米、宽6厘米的长方形框架，这根铁丝还剩多少厘米？
<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<gadget id="calculator">24 + 6</gadget>
<output>30</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">64 - 60</gadget>
<output>4</output>

<result>4</result>