The distance between the two places is 375km. Cars A and B drive from opposite places at the same time, and the two cars meet each other in 3 hours. Car A travels 68 km per hour, how many kilometers per hour does Car B travel? (Solution of column equation)
两地间的路程是375km，甲、乙两辆汽车同时从两地相对开出，3小时两车相遇．甲车每小时行68km，乙车每小时行多少千米？(列方程解)
<gadget id="calculator">68 * 3</gadget>
<output>204</output>

<gadget id="calculator">375 - 204</gadget>
<output>171</output>

<gadget id="calculator">171 / 3</gadget>
<output>57</output>

<result>57</result>