The ratio of flat roads to mountain roads between AB and AB is 2:1. Uphill roads account for 60% of the mountain roads, and the rest are downhill roads. It takes 8 minutes for a car to go downhill at a speed of 45 km/h. The speed ratio of flat roads is The downhill is less (1/5), what is the driving time on a flat road?
AB两地之间平路与山路的比2：1，山路中上坡路占60%，其余为下坡路，一辆汽车以45千米/小时的速度用8分钟走完下坡，平路的速度比下坡少(1/5)，求在平路的行驶时间？
<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">45 * (2/15)</gadget>
<output>6</output>

<gadget id="calculator">60 / 100</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">6 / (2/5)</gadget>
<output>15</output>

<gadget id="calculator">15 * 2</gadget>
<output>30</output>

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

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">45 * (4/5)</gadget>
<output>36</output>

<gadget id="calculator">30 / 36</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>