There are two barrels of peanut oil, A and B, and A has 45 kg. After pouring (1/5) from B into A, B is 3 kg less than A. What is the original kilogram of peanut oil in B?
有甲乙两桶花生油，甲桶有45千克，从乙桶倒出(1/5)给甲桶后，乙桶比甲桶少3千克，乙桶原有花生油多少千克．
<gadget id="calculator">45 - 3</gadget>
<output>42</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5) - (1/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">42 / (3/5)</gadget>
<output>70</output>

<result>70</result>