A barrel of oil, pour out its (1/3) for the first time, pour out its (1/2) for the second time, there are still 2 kilograms in the barrel. How many kilograms is this barrel of oil originally?
一桶油，第一次倒出它的(1/3)，第二次倒出它的(1/2)，桶里还剩2千克．这桶油原有多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/3) - (1/2)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">2 / (1/6)</gadget>
<output>12</output>

<result>12</result>