There are two barrels of oil, a total of 27 kilograms. After 2 kilograms of oil in the large barrel are used, the weight ratio of the remaining oil to the oil in the small barrel is 3:2. Please calculate how many kilograms of oil the barrel originally contained?
有大小两桶油共27千克，大桶的油用去2千克后，剩下的油与小桶内油的重量比是3：2．请你算算大桶原来装有多少千克油？
<gadget id="calculator">27 - 2</gadget>
<output>25</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">25 * (3/5)</gadget>
<output>15</output>

<gadget id="calculator">15 + 2</gadget>
<output>17</output>

<result>17</result>