A bee flies 7.2 kilometers in 0.4 hours, and a butterfly flies 7.5 kilometers per hour. How many times faster does the bee fly per hour than the butterfly?
一只蜜蜂0.4小时飞行7.2千米，一只蝴蝶每小时飞行7.5千米，蜜蜂每小时飞行的速度是蝴蝶的多少倍？
<gadget id="calculator">7.2 / 0.4 / 7.5</gadget>
<output>2.4</output>

<result>2.4</result>