A dragonfly flies 74.8 kilometers in 4 hours. According to this calculation, how many kilometers can the dragonfly fly in 3 hours.
一只蜻蜓4小时飞行74.8千米，照这样计算，这只蜻蜓3小时可以飞行多少千米．
<gadget id="calculator">74.8 / 4</gadget>
<output>18.7</output>

<gadget id="calculator">18.7 * 3</gadget>
<output>56.1</output>

<result>56.1</result>