Pour (1/5) of the oil from barrel A to barrel B. At this time, the two barrels have the same amount of oil. It is known that the original oil in barrel A is 60 kg, how much is the original oil in barrel B?
从甲桶中倒(1/5)的油给乙桶，这时两桶油同样多．已知甲桶原有油60千克，求乙桶原有油多少千克．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5) - (1/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">60 * (3/5)</gadget>
<output>36</output>

<result>36</result>