For a barrel of oil, take out 20% for the first time, take out 3 kg more than the first time for the second time, and take out a total of 27 kg for the two times. How many kilograms does the barrel of oil have?
一桶油，第一次取出20%，第二次比第一次多取出3千克，两次共取出27千克，这桶油原有多少千克？
<gadget id="calculator">27 - 3</gadget>
<output>24</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 2</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">24 / (2/5)</gadget>
<output>60</output>

<result>60</result>