An oil barrel originally contained some gasoline. If 36.5 kilograms are poured in first, and then 47.8 kilograms are poured out, exactly 50 kilograms are left. How many kilograms of gasoline were originally in the barrel?
一个油桶原来装了一些汽油，如果先倒入36.5千克，再倒出47.8千克，恰好剩50千克，桶里原来有多少千克汽油？
<gadget id="calculator">59.8 - 36.5</gadget>
<output>23.3</output>

<result>23.3</result>