For a kind of socks, the retail price for one pair is 1.56 yuan/pair, and if you buy a pack (12 pairs), the wholesale price is 14.4 yuan/pack. How much is each pair of socks cheaper than the retail price?
一种袜子，买一双按零售价1.56元/双，如果买一包(12双)，按批发价14.4元/包，这样每双袜子比零售价便宜多少元？
<gadget id="calculator">14.4 / 12</gadget>
<output>1.2</output>

<gadget id="calculator">1.56 - 1.2</gadget>
<output>0.36</output>

<result>0.36</result>