There is a barrel of oil, (1/3) of the total is taken out for the first time, and (2/5) of the total is taken out for the second time, and there are still 16 kilograms of oil in the barrel at this time. How many kilograms is this barrel of oil originally?
有一桶油，第一次取出总数的(1/3)，第二次取出总数的(2/5)，这时桶中还剩下16千克油．这桶油原来有多少千克？
<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">16 / (2/15)</gadget>
<output>120</output>

<result>120</result>