There are A and B two baskets of fruit. Armor weighs 25 kg. If 10 kilograms are taken from basket B and put into basket A. At this time, the weight of basket B is (4/7) that of basket A. How many kilograms of fruit did basket B originally contain?
有甲，乙两筐水果．甲重25千克．如果从乙筐中拿出10千克放入甲筐．这时乙筐的重量是甲筐的(4/7)．乙筐原来有多少千克水果？
<gadget id="calculator">25 + 10</gadget>
<output>35</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">35 * (4/7)</gadget>
<output>20</output>

<gadget id="calculator">20 + 10</gadget>
<output>30</output>

<result>30</result>