There is a barrel of edible oil, pour out its (5/9), exactly 10 kilograms are poured out, what is the original kilogram of this barrel of oil?
有一桶食用油，倒出它的(5/9)，正好倒出10千克，这桶油原有多少千克．
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">10 / (5/9)</gadget>
<output>18</output>

<result>18</result>