The hardware factory produces a total of 3,000 kilograms of iron nails, and after putting them into 100 wooden boxes, there are still 500 kilograms left. How many wooden boxes are needed?
五金厂共生产铁钉3000千克，装进100只木箱后，还剩500千克，还需要多少只木箱？
<gadget id="calculator">3_000 - 500</gadget>
<output>2_500</output>

<gadget id="calculator">2_500 / 100</gadget>
<output>25</output>

<result>25</result>