There are two barrels of oil, barrel A is 1kg more than barrel B, after pouring 3kg from barrel B to barrel A, the oil in barrel B is less than barrel A (1/4), what is the weight in barrel A now?
有两桶油，甲桶比乙桶多1千克，从乙桶倒了3千克给甲桶后，乙桶的油比甲桶少(1/4)，求现在甲桶内的重量？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">1 + 6</gadget>
<output>7</output>

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

<gadget id="calculator">7 / (1/4)</gadget>
<output>28</output>

<result>28</result>