A butterfly flies 3 kilometers in 0.4 hours, the speed of the bee is 2.4 times of its flying speed, how many kilometers is the speed of the bee?
一只蝴蝶0.4小时飞行3千米，蜜蜂的速度是它飞行速度的2.4倍，蜜蜂的速度是多少千米？
<gadget id="calculator">3 / 0.4</gadget>
<output>7.5</output>

<gadget id="calculator">7.5 * 2.4</gadget>
<output>18</output>

<result>18</result>