There are two baskets of apples, which should be distributed to three classes. Class A gets 2/5 of all the apples, and the ratio of the number of apples distributed between Class B and Class C is 7:5. It is known that the apples in the second basket are nine-tenths of the apples in the first basket. If 20 kilograms of apples are taken from the first basket and put into the second basket, the weights of the two baskets are equal. So, how many kilograms of apples does Class A get more than Class B?
有两筐苹果，要分给三个班，甲班得到全部苹果的五分之二，乙班和丙班分得苹果数量之比为7：5．已知第二筐苹果是第一筐苹果的十分之九，如果从第一筐中拿出20千克苹果放入第二筐，则两筐苹果的重量相等．那么，甲班比乙班多分得苹果多少千克．
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">2 / (1/10)</gadget>
<output>20</output>

<gadget id="calculator">20 * 20</gadget>
<output>400</output>

<gadget id="calculator">400 * (9/10)</gadget>
<output>360</output>

<gadget id="calculator">400 + 360</gadget>
<output>760</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">760 * (2/5)</gadget>
<output>304</output>

<gadget id="calculator">760 - 304</gadget>
<output>456</output>

<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">456 * (7/12)</gadget>
<output>266</output>

<gadget id="calculator">304 - 266</gadget>
<output>38</output>

<result>38</result>