The sporting goods factory produces 900 table tennis balls, each of which is packed in a bag of 5, and packed in a box of 6 bags. How many boxes can be packed?
体育用品厂生产900个兵乓球，每5个装一袋，每6袋装一盒，可以装多少盒？
<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">900 / 30</gadget>
<output>30</output>

<result>30</result>