There are two bags of rice, A and B, and bag A has 15 kg of rice. If (1/3) 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，甲袋米有15千克．如果从乙袋中倒出(1/3)给甲袋，两袋米就一样重．乙袋原来装米多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">15 / (1/3)</gadget>
<output>45</output>

<result>45</result>