There are 8,400 children's books, and every 40 books are packed in a box. It is known that 125 boxes have been packed, how many boxes can be filled in the rest? (two different solutions)
有8400本儿童读物，每40本装一箱，已知装好了125箱，剩下的还可以装多少箱？(两种不同的解法)
<gadget id="calculator">8_400 / 40</gadget>
<output>210</output>

<gadget id="calculator">210 - 125</gadget>
<output>85</output>

<result>85</result>