The fruit shop shipped 7 boxes of apples of the same weight. If 5 kg are removed from each box, the remaining apples are 5 kg more than the original weight of the 3 boxes. How many kilograms does each box of apples weigh?
水果店运来7箱同样重的苹果．如果从每箱里取出5千克，剩下的苹果比原来重量的3箱还多5千克．原来每箱苹果重多少千克？
<gadget id="calculator">5 * 7</gadget>
<output>35</output>

<gadget id="calculator">35 + 5</gadget>
<output>40</output>

<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">40 / 4</gadget>
<output>10</output>

<result>10</result>