A, B, and C go hiking together. A buys 2 kilograms of pies, B buys 4 kilograms of pies, and C does not. The three share the cost equally. C takes out 6 yuan, how much should he give to B Yuan.
甲、乙、丙三人一起去登山，甲买了2千克馅饼，乙买了4千克馅饼、丙没买，三个人平均分担这次费用，丙拿出6元钱，应给乙多少元．
<gadget id="calculator">2 + 4</gadget>
<output>6</output>

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">12 - 6</gadget>
<output>6</output>

<result>6</result>