There are 400 apples in a basket, which are packed into 4 boxes on average. If each box contains 5 bags, how many bags are there on average?
一筐苹果有400个，平均装进4个箱子中．如果每个箱子装5袋，平均每袋有多少个．
<gadget id="calculator">400 / 4 / 5</gadget>
<output>20</output>

<result>20</result>