There is one of the smallest birds in the world, the hummingbird. About 1000 hummingbirds only weigh 1 kilogram. How many kilograms does each one weigh?
在世界上有一种最小的鸟，蜂鸟．蜂鸟大约1000只才重1千克，每只的重量是多少千克．
<gadget id="calculator">1 / 1_000</gadget>
<output>1/1_000 = around 0.001</output>

<result>1/1_000 = around 0.001</result>