A butterfly flies 15.5 kilometers in 2 hours, and a bee flies 2.4 times faster than the butterfly. How many kilometers does the bee fly per hour?
一只蝴蝶2小时飞行15.5千米，一只蜜蜂的飞行速度是蝴蝶的2.4倍，这只蜜蜂每小时飞行多少千米？
<gadget id="calculator">15.5 / 2</gadget>
<output>7.75</output>

<gadget id="calculator">7.75 * 2.4</gadget>
<output>18.6</output>

<result>18.6</result>