The biological team has raised three white rabbits, the heaviest one is 2000 grams, and the lightest one is 1000 grams. What is the average weight of these three rabbits in grams?
生物小组饲养了三只白兔，最重的一只2000克，最轻的一只1000克，这三只兔子的平均体重在多少克之间
<gadget id="calculator">1_000 - 2_000</gadget>
<output>-1_000</output>

<result>-1_000</result>