The smallest bird in the world is the hummingbird, and the largest bird is the ostrich. An ostrich egg is 17.8 cm long, which is 1 cm more than three times the body length of a hummingbird. How many centimeters is this hummingbird?
世界上最小的鸟是蜂鸟，最大的鸟是驼鸟．一个鸵鸟蛋长17.8厘米，比一只蜂鸟体长的3倍还多1厘米．这只蜂鸟体长多少厘米？
<gadget id="calculator">17.8 - 1</gadget>
<output>16.8</output>

<gadget id="calculator">16.8 / 3</gadget>
<output>5.6</output>

<result>5.6</result>