The two barrels of oil weigh 340 kilograms in total. After 1/4 of the first barrel is used and 1/3 of the second barrel is used, the remaining oil is equal. How much is the original oil in the first barrel?
两桶油共重340千克，第一桶用去它的(1/4)，第二桶用去它的(1/3)后，所剩的油相等，第一桶原有油多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 340</gadget>
<output>340/3 = around 113.333333</output>

<gadget id="calculator">340 - (340/3)</gadget>
<output>680/3 = around 226.666667</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4) - (1/3)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">1 + (5/12)</gadget>
<output>17/12 = around 1.416667</output>

<gadget id="calculator">(680/3) / (17/12)</gadget>
<output>160</output>

<result>160</result>