There is a barrel of oil, 40% is taken out for the first time, and the remaining 60% is taken out for the second time. At this time, there are 36 kilograms left in the barrel. How many kilograms does the whole barrel of oil weigh?
有一桶油，第一次取出40%，第二次取出剩下的60%，这时桶内还剩36千克，全桶油重多少千克？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">36 / (3/5) / (2/5)</gadget>
<output>150</output>

<result>150</result>