A and B have two barrels of oil. The oil in barrel A is 1.2 kg heavier than the oil in barrel B. After pouring 3.1 kg of oil from barrel B into barrel A, the oil in barrel B is less than that in barrel A (1/4). Now A How many kilograms does the barrel of oil weigh?
甲乙两桶油，甲桶的油比乙桶油重1.2千克，从乙桶倒出3.1千克的油给甲桶后，这时乙桶的油比甲桶油少(1/4)，现在甲桶的油重多少千克？
<gadget id="calculator">3.1 * 2</gadget>
<output>6.2</output>

<gadget id="calculator">6.2 + 1.2</gadget>
<output>7.4</output>

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

<gadget id="calculator">7.4 / (1/4)</gadget>
<output>29.6</output>

<result>29.6</result>