After a barrel of oil is used up (1/6), another 2 kg is poured in. At this time, the ratio of the oil weight in the barrel to the original oil weight is 3:2. How many kilograms of oil is in the barrel?
一桶油用去(1/6)后，又倒入2千克，这时桶中的油重和原有油重的比是3：2．桶里原有油多少千克？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(3/2) - (5/6)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / (2/3)</gadget>
<output>3</output>

<result>3</result>