Two teams of students, A and B, set off from two places 18 kilometers apart at the same time and walk toward each other. A student rides a bicycle at a speed of 14 kilometers per hour to keep in touch with each other between the two teams, and pair A travels 5 kilometers per hour. , Pair B travels 4 kilometers per hour. When the two teams meet, how many meters will the students on bicycles travel in total?
甲乙两队学生从相隔18千米的两地同时出发，相向而行，一名学生骑自行车以每小时14千米的速度在两队间不停的往返联络，甲对每小时行5千米，乙对每小时行4千米，两队相遇时，骑自行车的学生共行多少米？
<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">18 / 9</gadget>
<output>2</output>

<gadget id="calculator">2 * 14</gadget>
<output>28</output>

<result>28</result>