A box of duck eggs contains 4 boxes, 6 pieces in each box. There are 480 duck eggs, how many boxes can be filled?
一箱鸭蛋，内装4盒，每盒6个．现有480个鸭蛋，可以装这样的多少箱？
<gadget id="calculator">480 / 6 / 4</gadget>
<output>20</output>

<result>20</result>