total of 65 bottles of three drinks. On average, every two people share a bottle of Coke; on average, every three people share a bottle of mineral water; on average, every four people share a bottle of Nutrition Express. Ask how many people participated?
三种饮料共65瓶．平均每两人分一瓶可乐；平均每三人分一瓶矿泉水；平均每四人分一瓶营养快线．问有多少人参加？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

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

<gadget id="calculator">(1/2) + (1/3) + (1/4)</gadget>
<output>13/12 = around 1.083333</output>

<gadget id="calculator">65 / (13/12)</gadget>
<output>60</output>

<result>60</result>