There is a barrel of oil, if 3.2 kilograms are poured out, (2/3) of this barrel of oil will be left, what is the mass of this barrel of oil in kilograms?
有一桶油，如果倒出3.2千克，就会剩下这桶油的(2/3)，这桶油的质量是多少千克．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.2 / (1/3)</gadget>
<output>9.6</output>

<result>9.6</result>