There are three drinking cups, the volumes are (1/2) liter, (1/3) liter and (1/5) liter. Wang Jun poured a bottle of 2 liters of fruit juice into one of the drinking cups, exactly 6 full cups. How many liters of drinking cups did Wang Jun use?
有三种饮料杯，容积分别为(1/2)升、(1/3)升和(1/5)升．王军把一瓶2升的果汁倒入了其中的一种饮料杯中，正好倒了6满杯．王军用的是多少升的饮料杯．
<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>