There are two bags of rice, A and B, and bag A contains 30 kg of rice. If (1/5) is poured from bag B to bag A, the two bags of rice will have the same weight. How many kilograms of rice did bag B originally contain?
有甲乙两袋米，甲袋装米30千克．如果从乙袋中倒出(1/5)给甲袋，两袋米就一样重．乙袋原来装米多少千克？
<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">30 / (3/5)</gadget>
<output>50</output>

<result>50</result>