Someone bought six bottles of drinks and paid 1.3 yuan for each bottle. When returning the bottle after drinking all the drinks, the salesperson said: "The price of each empty bottle is 1.1 yuan less than the price of the drink in the bottle. How much yuan has this person returned in total.
某人买了六瓶饮料，每瓶付款1.3元．喝完全部饮料退瓶时，售货员说："每只空瓶的钱比瓶中饮料的钱少1.1元，这个人一共退回了多少元．
<gadget id="calculator">1.3 - 1.1</gadget>
<output>0.2</output>

<gadget id="calculator">0.2 / 2</gadget>
<output>0.1</output>

<gadget id="calculator">0.1 * 6</gadget>
<output>0.6</output>

<result>0.6</result>