There are two boxes of apples, A and B. There are 45 apples in box A. The apples in box A are eaten (1/5), and the apples in box B are eaten (1/7). The remaining number of apples in the two boxes is exactly equal , How many original apples are in box B?
有甲、乙两箱苹果，甲箱有苹果45个，甲箱中的苹果吃了(1/5)，乙箱中的苹果吃了(1/7)，两箱剩下的个数正好相等，乙箱中原有苹果多少个．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">45 * (1/5)</gadget>
<output>9</output>

<gadget id="calculator">45 - 9</gadget>
<output>36</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">36 / (6/7)</gadget>
<output>42</output>

<result>42</result>