The distance between the two places is 210 kilometers. A passenger car and a freight car leave from the two places at the same time and meet each other in 3.5 hours. The passenger car travels 28 kilometers per hour. How many miles per hour does the truck travel?
两地间的路程是210千米，一列客车和一列货车同时从两地相向开出，3.5小时相遇，客车每小时行驶28千米．货车每小时行驶多少千米？
<gadget id="calculator">3.5 * 28</gadget>
<output>98</output>

<gadget id="calculator">210 - 98</gadget>
<output>112</output>

<gadget id="calculator">112 / 3.5</gadget>
<output>32</output>

<result>32</result>