Car A travels 84 kilometers per hour from Dongcheng to Xicheng, taking 3.6 hours, and car B takes 5.6 hours from Xicheng to Dongcheng. How many kilometers per hour does car B travel? (Solution by equation).
甲车从东城到西城每时行84千米，用了3.6时，乙车从西城到东城用了5.6时．乙车每时行多少千米？(用方程解)．
<gadget id="calculator">84 * 3.6</gadget>
<output>302.4</output>

<gadget id="calculator">302.4 / 5.6</gadget>
<output>54</output>

<result>54</result>