Uncle Lai's orchard produces 4,650 kilograms of navel oranges, and 150 boxes have been sold, leaving 450 kilograms. How many kilograms does each box of navel oranges weigh?
赖叔叔家的果园产脐橙4650千克，卖了150箱，还剩下450千克．每箱脐橙重多少千克？
<gadget id="calculator">4_650 - 450</gadget>
<output>4_200</output>

<gadget id="calculator">4_200 / 150</gadget>
<output>28</output>

<result>28</result>