Buying 2 bottles of liquor and 12 bottles of beer costs 56 yuan. It is known that the price of a bottle of liquor is equal to that of 8 bottles of beer. How much is the total cost of a bottle of liquor and a bottle of beer?
买2瓶白酒和12瓶啤酒共用56元，已知一瓶白酒与8瓶啤酒的价钱相等，那么一瓶白酒和一瓶啤酒共需多少元．
<gadget id="calculator">56 / 28</gadget>
<output>2</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">16 + 2</gadget>
<output>18</output>

<result>18</result>