A kind of milk has 8 bags per box, 200ml per bag, and the price of each box is 24 yuan. The merchant is promoting activities and advertising, buy 1 box and get 2 bags free. After the promotion, how much is this milk on average per liter?
一种牛奶每箱8袋，每袋200毫升，每箱售价24元，商家搞活动促销，打出买一箱送2袋的广告，促销后这种牛奶平均每升多少元？
<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">200 / 1_000</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">10 * (1/5)</gadget>
<output>2</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<result>12</result>