group of students started from the school and went to a certain farm to participate in voluntary labor at a speed of 4 kilometers per hour. After walking 1 kilometer, a student was ordered to go back to school at a speed of 5 kilometers per hour to pick up an item, and immediately chased the team at the same speed after getting the item, and finally caught up with the team at a distance of 1.5 kilometers from the farm ． Find the distance from the school to the farm.
一队学生由学校出发，以每小时4千米的速度去某农场参加义务劳动．走了1千米时，一个学生奉命以每小时5千米的速度回校取一件物品，取得物品后又立即以同样的速度追赶队伍，结果在距农场1.5千米的地方追上了队伍．求学校到农场的路程．
<gadget id="calculator">1.5 / 4</gadget>
<output>0.375</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1.5 / 5</gadget>
<output>0.3</output>

<gadget id="calculator">(1/5) - 0.3</gadget>
<output>-0.1</output>

<gadget id="calculator">0.375 + (1/4) + (-0.1)</gadget>
<output>0.525</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">0.525 / (1/20)</gadget>
<output>10.5</output>

<result>10.5</result>