car travels from A to B, 3/5 of the journey is flat, 3/8 of the remaining distance is uphill, and the rest is downhill. When I came back, the uphill road was 5 kilometers. How many kilometers are there between A and B?
一辆汽车从甲地开往乙地，平路占全程的3/5，剩下的路程中3/8是上坡路，其余是下坡路．回来时上坡路是5千米．甲、乙两地相距多少千米？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">5 / (5/8) / (2/5)</gadget>
<output>20</output>

<result>20</result>