The distance between the two places is 16 kilometers. Xiaoxiao and Naughty set off from the two places at the same time, walked toward each other, and met after 3.2 hours. Xiaoxiao walks 3 kilometers per hour, how many kilometers per hour is naughty. (calculate first with arithmetic, then solve with equations)
两地相距16千米，笑笑和淘气两人同时从两地出发，相向而行，3.2小时后相遇．笑笑每时走3千米，淘气每时走多少千米．(先用算术法计算，再用方程解)
<gadget id="calculator">3.2 * 3</gadget>
<output>9.6</output>

<gadget id="calculator">16 - 9.6</gadget>
<output>6.4</output>

<gadget id="calculator">6.4 / 3.2</gadget>
<output>2</output>

<result>2</result>