It takes 2 hours for a car to travel 144 kilometers, how many meters per second does the car travel?
一辆小汽车行144千米用去2小时，这辆汽车每秒行多少米？
<gadget id="calculator">144 / 2</gadget>
<output>72</output>

<gadget id="calculator">1 * 3_600</gadget>
<output>3_600</output>

<gadget id="calculator">1_000 / 3_600</gadget>
<output>5/18 = around 0.277778</output>

<gadget id="calculator">72 * (5/18)</gadget>
<output>20</output>

<result>20</result>