There is half a barrel of oil in an oil barrel, and after pouring out (3/5) of the oil, there are still 12 kilograms of oil left. How many kilograms of oil can this barrel hold?
一个油桶里装有半桶油，倒出油的(3/5)后，还剩下12千克油．这个油桶共能装多少千克油？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">12 / (2/5)</gadget>
<output>30</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<result>60</result>