There are two baskets of apples, A and B, in the store. After the apples in A’s basket are sold (1/5), and the apples in B’s basket are sold (1/7), the weight of the remaining apples in the two baskets is just equal. The original apples in the basket are 45 kg, how many kg of apples are in the second basket?
商店里有甲、乙两筐苹果，甲筐中的苹果卖了(1/5)，乙筐中的苹果卖了(1/7)后，两筐苹果剩下的重量正好相等，已知甲筐中原有苹果45千克，乙筐中原有苹果多少千克？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 - (1/7)</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">(4/5) / (6/7)</gadget>
<output>14/15 = around 0.933333</output>

<gadget id="calculator">45 * (14/15)</gadget>
<output>42</output>

<result>42</result>