A and B have two barrels of oil. The weight of oil in barrel A is (2/3) that of oil in barrel B. Oil in barrel B is 5 kg more than barrel A. How much does barrel B weigh?
甲乙两桶油，甲桶油的重量是乙桶油的(2/3)，乙桶油比甲桶油多5千克，乙桶油重多少千克？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">5 / (1/3)</gadget>
<output>15</output>

<result>15</result>