Two teams of students, A and B, set off from two places 26 kilometers apart at the same time, and walk toward each other. A student rides a bicycle at a speed of 14 kilometers per hour, starting from team A, and keeps going back and forth between the two teams. Team A travels 4.5 kilometers per hour, and team B travels 3.5 kilometers per hour. When the two teams meet, how many kilometers have the students on bicycles traveled in total?
甲、乙两队学生从相距26千米的两地同时出发，相向而行，一个同学骑自行车以每小时14千米的速度从甲队开始在两队之间不停地往返联络．甲队每小时行4.5千米，乙队每小时行3.5千米，两队相遇时，骑自行车的同学共行了多少千米？
<gadget id="calculator">4.5 + 3.5</gadget>
<output>8</output>

<gadget id="calculator">26 / 8</gadget>
<output>13/4 = around 3.25</output>

<gadget id="calculator">(13/4) * 14</gadget>
<output>91/2 = around 45.5</output>

<result>91/2 = around 45.5</result>