There are two barrels of oil. The oil in barrel A is 15 kg less than that in barrel B. Now pour one-twentieth of the oil in barrel B into barrel A. At this time, the oil in barrel A is 5 kg more than that in barrel B. The oil in barrel B is originally How many kilograms.
有两桶油，甲桶油比乙桶油少15千克，现在把乙桶油的二十五分之一倒入甲桶，这时甲桶油比乙桶油多5千克，乙桶油原来有多少千克．
<gadget id="calculator">5 + 15</gadget>
<output>20</output>

<gadget id="calculator">1 / 25</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">(1/25) - 1</gadget>
<output>-24/25 = around -0.96</output>

<gadget id="calculator">(1/25) + 1 + (-24/25)</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">20 / (2/25)</gadget>
<output>250</output>

<result>250</result>