The agricultural trade company purchased 820 kilograms of duck eggs, and the purchased eggs were 200 kilograms less than three times the amount of duck eggs. How many kilograms of eggs and duck eggs were purchased altogether?
农贸公司收购鸭蛋820千克，收购的鸡蛋比鸭蛋的3倍少200千克，鸡蛋和鸭蛋一共收购了多少千克？
<gadget id="calculator">820 * 3</gadget>
<output>2_460</output>

<gadget id="calculator">2_460 - 200</gadget>
<output>2_260</output>

<gadget id="calculator">2_260 + 820</gadget>
<output>3_080</output>

<result>3_080</result>