There are two barrels of oil, A and B, and the mass of oil in barrel B is equivalent to 120% of the oil in barrel A. When barrel A uses 21 kg of oil, the mass ratio of the oil used in barrel B to the remaining oil in barrel B is 2 : 3. At this time, the two barrels of oil weigh the same. What is the total weight of the two barrels of A and B?
甲、乙两桶油，乙桶油的质量相当于甲桶油的120%，当甲桶油用了21千克时，乙桶油用去的油与乙桶剩下的油的质量比是2：3，这时两桶油一样重，甲乙两桶油原来共重多少千克．
<gadget id="calculator">2.2 * 75</gadget>
<output>165</output>

<result>165</result>