There are three warehouses A, B, and C. If (2/7)t of rice is taken out from warehouse A to warehouse B, and then (2/7)t of rice is taken out to warehouse C, the three warehouses will have the same amount of rice. It turns out that warehouse A has more rice than warehouse B?
有甲、乙、丙三个仓库，如果从甲仓库先取出(2/7)t大米给乙仓库，再取出(2/7)t大米给丙仓库，三个仓库的大米就一样多的．原来甲仓库比乙仓库多多少t大米？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>