group of students went to a military camp outside the school. They traveled at a speed of 5 km/h. After they walked for a while, the school wanted to send an emergency notice to the team leader. The correspondent set off from the school and rode a bicycle at a speed of 14 kilometers per hour to catch up with the student team in just 10 minutes. ． How long did the students walk before the correspondent departed?
一队学生去校外进行军事野营训练，他们以5千米/小时的速度行进．在他们走了一段时间后，学校要将一个紧急通知传给队长，通讯员从学校出发，骑自行车以14千米/小时的速度按原路追去，只用了10分钟就追上了学生队伍．通讯员出发前，学生走了多长时间？
<gadget id="calculator">10 / 60</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">14 * (1/6)</gadget>
<output>7/3 = around 2.333333</output>

<gadget id="calculator">5 * (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(7/3) - (5/6)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) / 5</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>