A bottle of Fanta drink is 4.8 yuan, which is 0.5 yuan more than a bottle of pearl black tea. The money to buy two bottles of pearl black tea just buys a barrel of orange juice. How much is a barrel of orange juice?
一瓶芬达饮料4.8元，比一瓶珍珠红茶多0.5元，买两瓶珍珠红茶的钱正好买一桶橘子汁，一桶橘子汁多少元？
<gadget id="calculator">4.8 - 0.5</gadget>
<output>4.3</output>

<gadget id="calculator">4.3 * 2</gadget>
<output>8.6</output>

<result>8.6</result>