A person starts from Village A to Village B, stays in Village B for 1 hour, then goes to Village C, stays in Village C for another half an hour, and then returns to Village A. Carry out 4 kilometers, including the stopover time, it will take 6 and a half hours to go back and forth. Due to the detour when returning, the distance is 2 kilometers longer than that when going. Find the distance traveled when going (list the solution of the equation).
某人先从甲村出发去乙村，在乙村停留1小时后，又到丙村，在丙村又停留半小时后开始返回甲村，已知去进每小时行5千米，回来时每小进行4千米，包括停留时间在内来回共用去6个半小时，回来时因绕道关系，路程比去时多2千米，求去时所走的路程(列方程解答)．
<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">6.5 - (1/2) - 1.5</gadget>
<output>4.5</output>

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

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

<gadget id="calculator">(1/5) + (1/4)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">4.5 / (9/20)</gadget>
<output>10</output>

<result>10</result>