Two growers harvest bananas together, and grower A harvests 840 kg, which is twice the weight of grower B. How many kilograms of bananas did the two harvest together?
两位果农一起收割香蕉，甲果农收割了840千克，是乙果农收割重量的2倍．两人共收割了多少千克香蕉？
<gadget id="calculator">840 / 2</gadget>
<output>420</output>

<gadget id="calculator">420 + 840</gadget>
<output>1_260</output>

<result>1_260</result>