A, B, and C buy stocks. A buys stocks with (1/2) the amount of money used by B and C, and B buys stocks with (1/3) the amount of money used by A and C. ), it is known that C spent 3,000 yuan, how much did A, B, and C share?
甲、乙、丙三人买股票，甲买股票用的钱是乙、丙所用钱数的(1/2)，乙买股票用的钱是甲、丙两人所用钱数的(1/3)，已知丙用了3000元，求甲、乙、丙共用了多少元？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">3_000 / (5/12)</gadget>
<output>7_200</output>

<result>7_200</result>