The store retails Wahaha for 2.5 yuan. If you buy a box (24 bottles) for only 48 yuan, how much cheaper can your mother buy one box at a time?
商店零售娃哈哈2.5元，如果买一箱(24瓶)只需48元，妈妈一次买一箱可以便宜多少元？
<gadget id="calculator">2.5 * 24</gadget>
<output>60</output>

<gadget id="calculator">60 - 48</gadget>
<output>12</output>

<result>12</result>