There is 54 kg of oil in barrel A, and 36 kg of oil in barrel B. How many kilograms of oil in barrel A is poured into barrel B, and the amount of oil in barrel B is 5 times that of barrel A.
甲桶有油54千克，乙桶有油36千克，甲桶油倒入多少千克给乙桶，乙桶油是甲桶的5倍．
<gadget id="calculator">54 + 36</gadget>
<output>90</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">90 / 6</gadget>
<output>15</output>

<gadget id="calculator">54 - 15</gadget>
<output>39</output>

<result>39</result>