A certain army participated in a military exercise. A correspondent on a bicycle and the troops set off to the exercise site 5 kilometers away at the same time. When the correspondent arrived at the exercise site, the large army had only walked half the distance, and then the correspondent immediately returned to meet the large army. , After meeting the troops, turn around and ride to the exercise site, and then walk towards the army again after arriving at the exercise site... When the troops arrived, how many kilometers did the correspondents ride in total?
某部队参加军事演习，一个骑车的通讯员与部队同时出发去5千米以外的演习地点，当通讯员到达演习地点时，大部队才走了一半的路程，然后通讯员立刻返回与大部队相向而行，遇到部队后再返身骑向演习地点，到了演习地点后再次与部队相向而行…当部队到达时，通讯员一共骑了多少千米？
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">5 / (5/2)</gadget>
<output>2</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<result>10</result>