The ratio of the number of apples in the two boxes of A and B is 5:2. If 5 apples are taken out from box A and put into box B, the ratio of the number of apples in the two boxes of A and B is 9:5. How many apples are there in the two boxes? ? (Click on the idea: After taking out 5 apples from box A, the ratio of the apples in box A to the total number of apples in the two boxes also decreases accordingly.
甲、乙两箱苹果的个数之比是5：2，如果从甲箱取出5个放入乙箱后，甲、乙两箱苹果的数量比是9：5，则两箱苹果共有多少个？(思路点击：从甲箱拿出5个苹果后，甲箱苹果与两箱苹果总数的比值也相应减少了．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">9 / 14</gadget>
<output>9/14 = around 0.642857</output>

<gadget id="calculator">(5/7) - (9/14)</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">5 / (1/14)</gadget>
<output>70</output>

<result>70</result>