Car A and car B go from point A to point B. It takes 6 hours for car A to complete the journey. The speed of car B is 80% of that of car A. It is known that the speed of car A is 60 kilometers per hour. How many hours will it take for car B to complete the journey? ?
甲乙两车从A地到B地，甲车行完全程要6小时，乙车速度是甲车速度的80%，已知甲车速度是每小时60千米，乙车行完全程要几小时？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">60 * (4/5)</gadget>
<output>48</output>

<gadget id="calculator">6 / 48</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">60 * (1/8)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>