There are 7 baskets of apples. If 20 kilograms are taken out of each basket, the remaining apples in the 7 baskets are exactly equal to the weight of 5 baskets of apples. How many kilograms of apples are in each basket?
有7筐苹果，如果从每筐里取出20千克，那么7筐里剩下的苹果正好等于5筐苹果的重量，问原来每筐苹果多少千克？
<gadget id="calculator">7 - 5</gadget>
<output>2</output>

<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">20 * (7/2)</gadget>
<output>70</output>

<result>70</result>