The orchard packs the oranges harvested this year in three kinds of boxes. These three packing boxes can hold 12 kg, 25 kg and 50 kg respectively. If you choose two kinds of packing boxes and sell 30 boxes each, how many kilograms can you sell at most?
果园把今年收获的橙子用三种包装箱进行包装．这三种包装箱分别能盛12千克、25千克、50千克．如果选择两种包装箱，并且各卖30箱，最多能卖多少千克？
<gadget id="calculator">25 * 30</gadget>
<output>750</output>

<gadget id="calculator">50 * 30</gadget>
<output>1_500</output>

<gadget id="calculator">750 + 1_500</gadget>
<output>2_250</output>

<result>2_250</result>