After a barrel of oil is poured out (1/3), there are still 48 kilograms left. How many kilograms is this barrel of oil originally?
一桶油倒出(1/3)后，还剩下48千克．这桶油原来有多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">48 / (2/3)</gadget>
<output>72</output>

<result>72</result>