A barrel of oil is 240 kilograms, if (1/4) is used for the first time, how many kilograms will be used for the second time, and (1/3) of the total will be left?
一桶油240千克，第一次用去(1/4)，第二次用去多少千克，就会剩下总数的(1/3)？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>