A barrel of oil weighs 85 kilograms, and 24 kilograms of oil is poured out. There is just 3/5 of the oil left in the barrel. How much does the barrel weigh?
一桶油连桶共重85千克，倒出24千克油，桶里的油正好还剩(3/5)，油桶重多少千克？
<gadget id="calculator">3 / 5</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">24 / (2/5)</gadget>
<output>60</output>

<gadget id="calculator">85 - 60</gadget>
<output>25</output>

<result>25</result>