For a barrel of oil, 40% is poured out for the first time, and 13 kilograms less than the first poured out for the second time. At this time, there are 27 kilograms left. How many kilograms is the barrel of oil originally?
一桶油，第一次倒出40%，第二次比第一次少倒出13千克，这时还剩27千克，这桶油原有多少千克？
<gadget id="calculator">27 - 13</gadget>
<output>14</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">14 / (1/5)</gadget>
<output>70</output>

<result>70</result>