The smallest bird in the world is the hummingbird, and the largest bird is the ostrich. An ostrich egg is 18.3 centimeters long, which is 7.5 centimeters more than three times the body length of a hummingbird. How many centimeters is the body length of this hummingbird? (solution by equation)
世界上最小的鸟是蜂鸟，最大的鸟是鸵鸟，一个鸵鸟蛋长18.3厘米，比一只蜂鸟的体长的3倍还多7.5厘米，这只蜂鸟的体长是多少厘米？(用方程解)
<gadget id="calculator">18.3 - 7.5</gadget>
<output>10.8</output>

<gadget id="calculator">10.8 / 3</gadget>
<output>3.6</output>

<result>3.6</result>