Xiaopang took 30 yuan to the supermarket to buy a box of drinks. The price of drinks in the supermarket is: Type A drinks have 12 bottles per box, and each bottle is 3.2 yuan; each box of Type B drinks is also 12 yuan, and each bottle is 1.8 yuan. Which drink should he choose? How much did you spend in total?
小胖带了30元去超市买一箱饮料，超市中的饮料价格为：A种饮料每箱12瓶，每瓶3.2元；B种饮料每箱也是12元，每瓶1.8元．他应该选购哪种饮料？一共花了多少钱？
<gadget id="calculator">1.8 * 12</gadget>
<output>21.6</output>

<result>21.6</result>