Two barrels of oil are 27 kilograms in total. After 2 kilograms of oil in the large barrel are used up, the weight of the oil in the small barrel is 2/3 of the remaining oil in the large barrel. Please calculate how many kilograms of oil were originally contained in the large barrel?
大小两桶油共27千克，大桶的油用去2千克后，小桶内油的重量是大桶剩下的油的(2/3)，请你算算大桶原来装有多少千克油？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 * (2/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(4/3) + 27</gadget>
<output>85/3 = around 28.333333</output>

<gadget id="calculator">(2/3) + 1</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(85/3) / (5/3)</gadget>
<output>17</output>

<result>17</result>