A and B brought the same amount of money, and used all their money to buy washing powder. A took 12 bags, and B took 8 bags. After returning home, A supplies B with 3.8 yuan, how much is each bag.
甲乙两人带着同样多的钱，用他们全部的钱买了洗衣粉，甲拿走了12袋，乙拿走了8袋．回家后甲补给乙3.8元，每袋多少元．
<gadget id="calculator">3.8 + 3.8</gadget>
<output>7.6</output>

<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<gadget id="calculator">7.6 / 4</gadget>
<output>1.9</output>

<result>1.9</result>