The largest bird in the world is the African ostrich, and the smallest bird is the hummingbird. African ostriches generally weigh 90 kilograms, which is equivalent to the weight of 45,000 hummingbirds. How much does a hummingbird weigh?
世界上最大的鸟是非洲鸵鸟，最小的鸟是蜂鸟．非洲鸵鸟一般体重90千克，相当于45000只蜂鸟的体重．一只蜂鸟多少重？
<gadget id="calculator">90 / 45_000</gadget>
<output>1/500 = around 0.002</output>

<gadget id="calculator">(1/500) * 1_000</gadget>
<output>2</output>

<result>2</result>